From the perspective of the performance of both teams in the last few matches, Barcelona is more favored this time even though the statistics of both teams are always dominated by Bayern Munich. The Hansi Flick factor and playing at Camp Nou have made their confidence grow, Barcelona are also on a mission of revenge after Bayern Munich have embarrassed them several times. Hansi Flick can also be more flexible in his strategy after Fermín López, Dani Olmo and Gavi returned from injury.
Source: 365Scores
If we are rating based on recent performance and form, Barcelona should be favored in this game especially as they will be the host; but I am also considering how bad Bayern Munich's performance was in their last three games across all competition, they can't keep dropping points, they will need to start winning games by all means and this their match against Barcelona will be an important match for them because Champions League is an important factor for Vincent Kompany because Bayern is indeed a big team and will want to make it to the next round of the Champions League.Source: 365Scores
Flick on the other hand will want to end the embarrassment Bayern Munich is doing Barcelona even though he was one of the coaches that made it happen then; therefore, Barcelona can equally win the match since they will be playing the match at camp noe.