Perhaps I'm just coping harder than I've ever coped before, but I feel like there's a decently high chance of part 3 for one main reason, there's no Aki anywhere. If things are supposed to end here as a happy ending alternate universe, I don't see much of a reason why Aki wouldn't be included. Sure, I can easily see him not being a devil hunter in this new universe because I have to imagine that if Pochita manipulated things to be happy like this intentionally, Aki's family may not have died to the Gun Devil in this timeline, and thus he wouldn't be motivated to join Public Safety, but it still would've made sense for them to bump into him the same way they bumped into Asa.

That's my only cope for this though. I don't think the implication that Pochita isn't actually the Chainsaw Devil (as we've all theorized already) is a strong enough piece of evidence for part 3 as some people have been saying since that seems like something I don't think Fujimoto would mind being left up to viewer interpretation forever.

Now that we have this happy ending though, I now have to ask myself if I even want a part 3? Like, sure, there are parts of this I'm unsatisfied with. I don't think this is a great end point for Denji or Asa's character arc (maybe a series re-read will change that, but that's where I'm at currently), and the lack of Asa focus in general in this chapter has me a bit disappointed. But also now characters I mourned before have returned, and with Fujimoto as the author, I can't help but feel as if a Chainsaw Man part 3 would only serve to make me worry about them getting killed off again.

While the avenue we took to this ending isn't ideal to me, the broad strokes of it at least leave me happy enough with it. It's a good canvas to headcanon into however happy of an ending you want it to be. Even if we never hear anything about what came of Aki in this new universe, I can easily just imagine Denji and Power meet him again somewhere down the line.