Its a tough situation to bet on but at the end of the day it's all speculation and I think it would be a shame if this big match was left without any betting on it. I personally might bet that this match will probably end in under 3 or maybe both of team to score. But on the one hand this is also risky especially when looking at the statistics and h2h of the two teams, especially for Barcelona who could not score even 1 goal in the last few meetings against Bayern, it will still be a little risky too but I will try this.
Barcelona and Bayern Munich are familiar with each other when it comes to the champions league competition but one thing that has happened in the two teams is the change of coach and the current squad in the two teams else it would be been an easy game to pick the favorite to win the game. The head to head statistics clearly favours Bayern Munich but the odds are in favour of Barcelona probably because of the performance of Bayern Munich against Aston Villa or the home advantage of Barcelona since they are the host but aside that, I think betting any of the team to win is more risky so both teams to score is a preferred option for me or better still betting them on goals like over 2.5 wouldn't be a bad option because Barcelona and Bayern Munich will definitely want to score each other in the game.