Below is the former team of banjo Kazooie. There are 3 candidates who can possibly get into Playtonic.
Later I will dig into the team from other games.
Chief of Ideas
Rare / Microsoft Studios
Creative director at Sony Computer Entertainment Europe.
Chief Keyboard Tapper
Deputy Keyboard Tappers
Technical Software Architect at PrintSoft
Rare, MGS, Rare Ltd
Left Rare in January 2003, unknown
Technical Director SOHO
Other Keyboard Tapping
Mark Wilson Senior Programmer at Rare Ltd
Head of Development, Nosy Crow
Seems Unemployed currently
Big Noise Maker
Freelancer, currently helps composing for Playtonic
left Rare in 2013, I'm unable to find anything else on this person.
Has a small indie game design company, it seems like it's a one man company currently!
quote: Building on my experience making the rocket-barrel and mine-cart for DKCR
Seems like they could use him
edit: Just mailed him to ask a few questions, couldn't resist.
Confirmed to not join Playtonic
According to LinkedIn he left rare and is currently unemployed (or did not specify his current work)
Furthermore my eyes are looking at some other people right now: Ryan Stevenson, Gregg Mayles and Louise Ridgeway. None seem likely currently... Nor would they state so right now when asked as they are working at Rare currently. It's purely based on activity through LinkedIn
edit: Ed Bryan just caught my attention, I'll keep an eye on him.
edit2: Edward Bryan confirmed as guest artist!