Just to clear up this bloody annoying Rare issue. Both companies played a part, they fell out because Rare took far too long making games. Remember Starfox Adventures on the Gamecube? It was meant to be on the N64, half-way through its life. Nintendo got sick of Rare's lazy attitude and sold them. Don't ask for a source, I can't give you one, go look it up yourself if you think I'm wrong.
Secondly, Rare are making a game on the DS for Nintendo, there's a new Diddy Kong Racing coming out for the DS, similar to the one on the N64 minus a few characters because they now belong to Microsoft.
And about Banjo-Kazooie, I didn't particularly enjoy them so I have no complaints, but I'm sure Rare will want to prove their worth to Microsoft.