Of those possibilities, Midway would not be a good one to bring back - by the end of its operational life, it had major seakeeping issues - and Forrestal, Saratoga, Ranger and Independence are just very, very old - Forrestal was commissioned in 1957, don't forget. John F. Kennedy, Kitty Hawk and Constellation would be easier to return to service, and probably more efficient at that.
Technically, the US has 11 CBGs - 10 Nimitz class (Nimitz, Dwight D. Eisenhower, Carl Vinson, Theodore Roosevelt, Abraham Lincoln, George Washington, John C. Stennis, Harry S. Truman, Ronald Reagan and George H.W. Bush) and USS Enterprise.
Firstly, I don't know how we'd get two wars simultaneously. Who has that kinda military ability? China? South Korea, Japan and Taiwan have militaries, too. Russia? Good luck with that. India? Navy's not strong enough and they have no point of fighting a war. I can see one of those, not two.