Yeah of course. PSG can't be ruled out. Mbappe always has a potential to make a huge impact on a matchup to change the direction of it. His performance will be key against Dortmund as well in my opinion. When he doesn't have a good day Luis Enrique just hopes to see his team showing a better performance as a whole. This is really a sad factor about PSG. They aren't like Manchester City for example. They can't stand strong mostly in big games when their most important player doesn't play impressively. 

I also wouldn't like to see a Dortmund - Bayern Munich finale like in the 2012/13 season. It would be really boring for the reason you said.