Sources report that there’s a lot going on at IW, and that it’s not good. It seems there’s some contractual issues between IW and publisher Activision. Apparently there was security present at the IW building and apparently studio head Jason West is now unemployed, according to sources citing his Facebook.
For the details I recommend checking out one of my sources, but I will update you when major news comes out.
Update:
Check this site for more information, it seems like Zampella and West are definitely gone from IW. Activision is planning on a new type of Call of Duty game and what happens next is not yet known.