Where do you hear these rumours? And if you knew your basic COD info you'd know straight away that it's BS.
Seriously, people need to understand the difference between:
Activision - The Owners of the COD Franchise, its publishers.
Infinity Ward - The Makers of COD1, 2, 4, MW2, MW3.
Treyarch - The Makers of COD 3, WaW, BO, BO2.
Sledgehammer - Recently acquired to help IW because of studio departures.
Raven Software - Help with All games DLC.
IW do not own MW, hence the lawsuit, 3Arc do not own BO, hope this helps and tell your friends.
3arc > IW
IW just made the same game. MW2 > MW3. Same game, but I like MW2 a whole lot better. Not as many kids as there are today.
3arc Made 3 extreamely great games. 3, WAW, BO. I hope BOII does good because it didn't look as fascinating as the other ones did. Looks like a combo of Battlefield, Halo, and Call of Duty. Hope it does good and corrects IW mistakes.
Ok, Jason West and Vince Zampella worked for a company named 2015 inc. They were part of the team that created Medal of Honor: Allied assault. Then Jason and Vince left 2015 inc. and formed Infinity Ward. Activision funded Infinity Ward and therefore owned the company. Infinity Ward created the Call of Duty franchise, now fast forward to MW2 and the founders of Infinity Ward (Jason and Vince) had some issues with Activision and a law suit followed. Jason West and Vince Zampella left the company they had created and started a new company called Respawn Entertainment. Since Activision funded Infinity Ward they still own it. For example EA funded there new company Repawn Entertainment, so even though it's run by Jason and Vince it's actually owned by EA.
...hope this clears some stuff up for people. Here's a link to Jason and Vince's new company's site. They're currently making another FPS.