CoD 5 called Call of Duty: World at War, set in Pacific
Update: A ton of detail's just come out of the gamesTM issue. See here.
Update 2: And now you can read the entire OXM UK cover article online.
Call of Duty 5 has been confirmed as being called Call of Duty: World at War and is set in the Pacific theatre of WWII.
The news comes from subs issues of UK mag gamesTM, which landed this morning.
Thanks, evilashchris.