We'll be bringing you regular updates throughout the day as the recently-crowned Bundesliga title-winners seek to finish the job they started so convincingly in the Bavarian capital last week.
19:15 And if all that has whet your appetite, turn to bundesliga.com'slive coverage of tonight's match with all the latest facts, stats and comments on what is set to be another cracking night of Champions League entertainment.
19:10 Did you know? Some interesting facts to ease us into another entertaining night of top-table European football action...
Barcelona are unbeaten in 21 home UEFA Champions League matches.
Bayern have been beaten 4-0 before in the Camp Nou - four years ago.
That result was Bayern's only defeat against the Catalans with four wins and two draws completing the picture.
18:40 The conditions in Catalonia are perfect with a hot spring sunshine welcoming the thousands of travelling Bayern fans anticipating their side's third successful Champions League semi-final in four years.
18:23 There have been a few big comebacks in European football history, but you have to go back as far as 1985/86 for the last major upset, and Borussia Mönchengladbach fans will not need too much reminding of their UEFA Cup third round elimination to Real Madrid when a 5-1 first-leg lead was not enough to take them through.
Bayern coach Jupp Heynckes will have rather fonder memories of that mother of all comebacks - he was sat on the Real bench for their 4-0 second-leg victory. Such a scoreline after 90 minutes at the Camp Nou would mean extra-time and possibly penalties tonight.
18:15 We want to know if Bayern are going to complete an all-German Champions League final tonight. What do you think? Don't forget to cast your vote on our homepage.
Elsewhere, several Dortmund players took to twitter to express their delight at reaching the showpiece match later this month:
Marco Reus: "Yeeeeeeeeeeeeeeeeeeeesssssssssss :-)))))))). Unbelievable! What a day for the club and for all of us! Fiiiiiiiinal! Thank's for all the incredible support!"
Mario Götze: "Wembley calling:) I hope to be fit again soon."
Ilkay Gündogan: "I can't say it often enough: I'm so sorry that I didn't score to decide the tie earlier."
Nuri Sahin: "Wembley Calling !!!"
Real Madrid and Germany midfielder Mesut Özil: "It's a shame, but the atmosphere was fantastic. Thanks to all the Real fans and congratulations to Dortmund."
Andre Schürrle(Bayer 04 Leverkusen): "Congratulations to BVB and my bros:)) Get well soon Mario! Good night everyone!
17:40 Bayern have done it once, but can they do it again? Stopping Lionel Messi is the key to victory, according to Spanish football expert Graham Hunter, who told bundesliga.com how Bayern can join Dortmund in the Champions League final.
They certainly paid due attention to that warning to keep Messi out of the game at the Allianz Arena a week ago. Just to refresh your memories about that game, here is bundesliga.com's first-leg match report.
17:20 There's praise even from Dortmund's rivals Schalke...
Jermaine Jones: "There is only one name for it all and that is Jürgen Klopp: 2x Bundesliga champions, 1x DFB-Cup winner and now CL Final, all in the last three years. Respect"
Christoph Metzelder: "'90 minutes in the Bernabeu are long enough!...but not long enough! Congratulations to BVB!"
17:00 Meanwhile, praise is still pouring in for Dortmund...here's a collection of some of the well-wishing messages:
Ruud Gullit: "Congratulations to BVB, you deserved it. Compliments to Real Madrid for giving it a real go."
Dirk Nowitzki (NBA Basketballer): "You made it exciting...hats off to BVB."
Jan Josef Liefers (Actor): "Congratulations to Dortmund! Half of the final is complete!!!"
Axel Stein (Actor): "Congratulations to BVB! Boy was that exciting....woooow"
16:45 The fact that six of his players are a booking away from missing the final, should they get there, will not in any way influence head coach Jupp Heynckes's team selection. Four of them - Philipp Lahm, Bastian Schweinsteiger, Javi Martinez and Dante - are set to start this evening, with Luiz Gustavo and Mario Gomez likely to be on the bench. Skipper Lahm, for one, mastered a similar situation last year, effectively keeping Cristiano Ronado under wraps in the semi-final return meeting with Real Madrid without his name going into the referee's book.
15:50 Back to Borussia Dortmund for a moment, and while Spanish journal Marca struck up a musical note in deference to the BVB head coach, with "All you need is Klopp - la-la-lara-la" and As surmised that "Dortmund are worthy finalists", the man whose first-leg scoring spree got them there was busy posting the good news fresh from the changing room at the Santiago Bernabeu.
15:30 Barca coach Tito Vilanova is looking for a "2-0 lead at half time" this evening, which would leave the hosts half-way to becoming the first team ever to recoup a four-goal deficit in the Champions League. And World Player of the Year Lionel Messi, largely anonymous and possibly still hampered by an injury in Munich last week, remains convinced that, "We can do it!"
14:10 Turning to this evening's events at the Camp Nou and FC Bayern's players and management alike have been at pains to stress that complacency is simply not an option, that handsome 4-0 cushion notwithstanding. "We need to deliver an intelligent, razor-sharp performance, and not charge in mindlessly," CEO Karl-Heinz Rummenigge said before the squad set off for Catalonia.
Franck Ribery, a member of the Bayern side taken apart 4-0 at this very venue back in April 2009, has likewise warned that, "It' s not over yet! I know first-hand how tough it is at the Camp Nou." To prevail this time around, the French wing wizard knows that, "We're going to have to put in a lot of work and a lot of legwork, and do it as a team."
13:45 It isn't all good news for Dortmund, meanwhile, with Mario Götze's contribution to the proceedings coming to a premature end after only 14 minutes due to a thigh muscle strain. With an average recovery time of three to five weeks, the injury could even threaten the attacking star's participation in the May 25 Wembley final.
"It's going to be tight," BVB head coach Jürgen Klopp admitted. With Götze a definite non-starter for Saturday's Bundesliga showdown with his future employers Bayern Munich, Klopp indicated that improvisation will be the order of the day at the Signal Iduna Park, saying, "We'll need to see who we can put out on the pitch. There aren't that many options at the moment."
12:45 London's Wembley Stadium is the venue for this season's grand finale and Borussia Dortmund made sure of their place in it, despite a late scare against Real Madrid yesterday evening. With the hosts suddenly 2-0 up, the final few minutes at the Estadio Santiago Bernabeu became as Spain's El Mundo Deportivo put it, "A war of nerves - for the players out on the pitch and the crowd in the stands." Jürgen Klopp's men held theirs well enough to see down the clock, and earn the Yellow-Blacks that coveted spot in the final of the tournament they won back in 1997.