Not really... I'll start a discussion.
What do you all want to see return from the first two games? Let's get some of the obvious ones out of the way:
Mumbo - He has to be in it. No excuses Rare!
Bottles - See above Also must include arguments with Kazooie.
Grunty - Wouldn't be the same without her would it? She remains one of my favorite villains ever. (Rare must also include some new rhymes for her. They must be as funny as ever)
Jinjos! - Everyone loves Jinjos, the cutest creatures in any game ever.
Some old Levels remade? - Treasure Trove Cove, Rusty Bucket Bay and of course Click Clock Wood. In fact, just remake them all and add in some new levels, that would make me happy!