The Navy and Marines I could see more as a starting basis for the F-35. So 2010 eh? I wonder if any prototypes have started carrier trials. Concentrating on the carrier aircraft first is always best, since it is easier to "de-carrier" an aircraft design than adapt a land-based aircraft design for carrier use. In the meanwhile they should continue to concentrate F-22 production on replacement for the F-15C.
Because air superioirty comes first and foremost.
The USAF, like many top-of-the-line air forces, has used air superiority fighters in aerial conflicts.