Frankly, I'd rather not have anyone return. I'm sooo over David at this point.
But, I think its likely we'll either get some of the covenant's "hanging" cryopods crew woken up, plus Daniels.
Or, we get the covenant being intercepted by an angry bunch of engineers in a croissant ship trying to retaliate.
Or we get the "beginnings" of what will eventually be hadleys hope.