Likely he has a second money fight in a Canelo rematch, but I'd really want to see him fight Ennis and/or vergil and either pass the torch or add another name to his resume.
I'd like to see him fight Bivol, Beterbiev, Alimkhanuly or Ennis. And no Light Heavy is not a stretch, he didn't look undersized in any way at 168..It's not like he looked too small for the weight like Pacquaio did at Light Middleweight or Loma did at Lightweight.
Realistically a Canelo rematch will have a lot more money involved than moving up. Or Crawford will call it a day, hes an ATG but he isn't a particularly active fighter.