http://ps3.psu.com/Call-of-Duty-5-WWII-bound-News--a2121-p0.php Why oh friggin' why would you put it back to the World War 2 bullcrap? Modern Warfare was awesomeness wrapped in a disc and these morons are going to ruin the series by going back to the very tried and very tested World War 2 shooter.
Treyarch didn't make Duty 4. They made Duty 3 while Infinity Ward made Modern Warfare. Infinity Ward made Duty 1 and 2. Treyarch is completely different. Treyarch will make another WWII game while I assume Infinity Ward will continue work on a modern warfare sequel. Don't panic.