According to MundoRare
Banjo-Tooie will be coming to XBLA and is being developed by 4J Studios (the studio behind the already announced Banjo-Kazooie port). Rare have already confirmed that there will be some Stop 'N' Swap
features brought back to life in Banjo-Kazooie which will work alongside Nuts & Bolts, and now with Banjo-Tooie possibly in the works, the entire concept could be brought back. Lastly, according to CVG
, who were able to get their hands on with the game, the BK port will retain all references to Nintendo.
EDIT: Doubly-confirmed via a 1up preview. HERE