yes I think PSG will win easily against Lyon, we can see this from Lionel's performance back to how it used to be. I saw in several matches, both in the league and in the UCL, Messi was back as hot as when he was at Barcelona. PSG will be eyeing a positive trend at a time when lyon is currently in a less good trend.
In his second season with PSG, Messi has a better performance but now he is playing like a midfielder, a play maker. Maybe it is what PSG really needs from Messi. They already have Mbappe to score goals but the appearance of Messi help to increase their unpredictable and dangerous attacking.
We see the connection of Messi, Neymar and Mbappe is very dangerous in this season. They must maintain the connection and avoid conflict of interest. If they can do this, I believe they will be able to win Champions League. Messi knows his career is counting down till ending. Just a few more seasons and he really wants to win another Champions League.
Federer recently announced his retirement and Ronaldo in this season has a terrible decrease in performance. Messi should feel fearful when age impact becomes bigger.