Unfortunately for Rare, someone in the company has leaked 13 secret photos from the new BK game, which is going to be titled Banjo Kazooie: Nuts and Bolts.
You can check them out here. Use them to formulate what you think this game will be like, then you will find out on November this year.
EDIT: Sources state that the game will be very vechile based, allowing you to create your own vechiles and then test them out. You get to mix and mash stuff and build in almost a “LEGO like” fashion. You know you want this game.