Say Jon died, at least temporarily, at the end of aDwD. Who (and why/ in what order) are the five people he should meet in Heaven?
I think that's more or less what's going to happen. When their human body dies, wargs slide into animals and plug into the weirwood system, where Bran and Bloodraven are waiting for Jon so that they can show him what he needs to know. It won't be quite the same as meeting them, since the ability to reach out and interact with the events being observed seems to be limited to Bran, but I do think he'll get some otherwise impossible face time with people.
Who it will be is a bit less certain. There are characters I'd really enjoy watching him come face-to-face with, especially if he could interact. In chronological order, not order of importance:
- Lyanna, of course. It'd be a powerful moment for both of them, to see how much alike they are. Finding out who she is would prepare him for meeting
- Rhaegar. As a reader I'm curious to hear him explain himself, and in-universe, Jon needs to know what he needs to know from
- Azor Ahai and/or the Last Hero and/or whoever had the ideas that let humanity defeat the Others the last time around. It's a massive task, but there should at least be one person in the world who isn't entirely clueless as to how to go about it. (Which is why this is the one that almost certainly won't happen on the page – it would give away too much both about what's going to happen and about the metaphysical realities of the 'verse. But I'd like to see it.) Task in hand, Jon would ideally get an emotional boost in the form of last meetings with
- Ned for some emotional closure about how it all happened and
- Robb, as a touchstone for the human being that Jon is. He's in for both an identity crisis and an existential crisis, but he can't afford to get swallowed up by Destiny(TM) – not least because that would render him a person who can't do whatever it is that he'll probably have to do.
Whatever ends up happening will probably be a lot more exciting than that, but that’s my wishlist for the moment.