The conditions are still the same as they were and even looking at what Arsenal did against Porto I don't think Arsenal will be favourites in the game they're about to play.
Arsenal's condition in the Champions League is difficult to predict as well as Bayern who are still experiencing problems that they cannot solve properly so by looking at this it is likely that in the match everything becomes very difficult to predict.
Another situation that is happening now is just seeing how they perform in domestic competitions in the near future even though maybe this will not have a big impact because domestic competitions cannot be compared to the Champions League but still positive results in domestic competitions can have more impact on Arsenal and Bayern in terms of their mentality.
I've been opportuned to watch Arsenal play against Bayern Munich in several occasions and never have I experienced an Arsenal win against the German Bundesliga club and that's why a lot of people including bookmakers are already backing Bayern Munich to easily eliminate Arsenal and progress to the quarter finals of the the UEFA Champions League competition but I don't think it'll be as easy as most of us think of the tie. During the times I watched Arsenal lose to Bayern Munich, Arsenal's form at those moments weren't as impressive as it is at the moment and Bayern Munich's inconsistency weren't as bad as it is now which is why I think Arsenal have a good chance to get a good result that'll see them progress to the next round of the competition at the expense of their opponents Bayern Munich.Arsenal's condition in the Champions League is difficult to predict as well as Bayern who are still experiencing problems that they cannot solve properly so by looking at this it is likely that in the match everything becomes very difficult to predict.
Another situation that is happening now is just seeing how they perform in domestic competitions in the near future even though maybe this will not have a big impact because domestic competitions cannot be compared to the Champions League but still positive results in domestic competitions can have more impact on Arsenal and Bayern in terms of their mentality.
Arsenal is currently leading the English Premier League table and are still very much interested in winning the league title this season even when they're in strong battle with Liverpool and Manchester City while Bayern Munich is currently trailing German Bundesliga leader Bayer Leverkusen by 10 points difference. So that goes a long way to tell that Arsenal have simply been the better team this season and might just pull a surprise and eliminate Bayern Munich
In addition for the last 3 matches conducted the result is Bayern won by a landslide with the same score.
Source : https://www.uefa.com/uefachampionsleague/history/h2h/50037/52280/
Even though this cannot be used as a reference for now because the time comparison is quite long because the last time they met was 8 seasons ago but I don't think its wrong to see the differences that occur in this case so that we don't make it too easy for Arsenal. Currently Bayern are indeed experiencing many problems faced including with Tuchel's coaching which is still not very visible but despite that Bayern are still one of the strong clubs today.
This season Arsenal are doing well and can even get to the quarter-finals in the Champions League but it seems like they are having bad luck because looking at the current conditions even if Arsenal can finally win against Bayern in the quarter-finals, the semi-finals also have to wait for the opponent between Madrid and Manchester City.