PSG has won Barcelona and Manchester City, the only 3 strong teams that are remaining is Arsenal, Real Madrid and Bayern Munich which if they meet PSG they will still be defeated. PSG still stand the better odd to win this season's champions league, it will only take so much work before they can be eliminated.
I have doubts, they will eventually lose one and if they manage to survive without getting defeated I any of those match, I can agree that they have even higher chance to win it again this year. It would be interesting to see them lifting that big cup again next year.
Villarreal against PSG will be an easy win for PSG, I know they have injury problems but since it didn't stop them from winning Barcelona, it wouldn't stop them from winning Villarreal a La Liga team too. PSG players must play carefully in order to avoid injury if not a time will come when it will start affecting the performance of the team.
Don't forget that Barcelona problem was their defense. I doubt Villareal really has much to offer in Champions league. Count it as another 2 points for the Paris warriors once again.