*As you said, Kazooie and Tooie don't necessary need updates as they have aged wonderfully. But it would be sweet.
*A full remake from the ground up, using the best technology around would be A MAZE ING!
The Crash/Spiro treatment would work so well, it would bring the bear and bird back to relevancy and FINALLY pave the way for a Banjo-Threeie
*Playtonic aren't the right people to do it though. Rare should carefully choose the right company to handle the remakes (maybe the company that did crash and spiro) whilst also being very involved in the project themselves.
The game should be released on Xbox and Nintendo.
*Note to yourself Jregis. You say you are going to 100% Tooie. All I can say is good luck with that Cheato Page from Canary Mary