I don’t think that the likelihood of such a final is high - firstly, the teams can meet at earlier stages of the tournament, and secondly, they are not favorites. Take a look at the bookmakers' odds on who will reach the final:
Manchester City 1.96
Fc Bayern Munich 2.58
Real Madrid 3.19
Arsenal 3.68
~snip~
Why's Arsenal on this list? They're not the side to leave there,I'd rather want to see Paris Saint Germans.
Real Madrid with that odd because they have no good enough striker. They're still my favorites to win regardless.
Bayern Munich are good I just double doubt the impact Thomas Tuchel can bring Into Bayern Munich and the players, Manchester City yet again Buzzing with the return of Kevin De Bruyne back. He's already made a great impact right now in this game. They have a very good chance of defending but I won't support until they do win.
We don't see see PSG among them because their performance until this moment has been really poor.

PSG actually follow these four teams right behind according to bookies but there is a huge odd difference between PSG and them at the same time. I don't question it much also after the performance I watched from them until now.
PSG just don't play here the same way they do in the Ligue 1. Their performance is much more unreliable especially in away games. If you checked out their away games in the group games you would understand me easily. I think that PSG would be eliminated quickly if they face a title contender earlier.