Today will be a really exciting match. Because Arsenal will play in England and we saw how dangerous they are at home with the win against Real Madrid. We will see if they can do the same against Paris Saint-Germain. I think Paris Saint-Germain will try to get the best score in this match because they are one of the best teams in the Champions League. I think they will probably win the match in France too.
We have seen Real Madrid play terrible, on the second game specially when they needed a comeback, but lets remember that the first game was a 3-0 because Rice scored two freekicks that were unheard of from him or from Arsenal in general. How many goals do they have from freekicks directly this season? Not many, and that is why they shouldn't expect the same thing.

PSG also played quite dominant against Liverpool, so they know how to play, they already beat two English teams, both Liverpool and Villa. While you may consider Villa as not a great team, Liverpool is literally the champions, so to say that you are going to end up beating PSG is a tough ask for Arsenal. Obviously PSG isn't going to have easy time neither, I just want to emphasize how they are both great.