"Rise of fascism" scenarios can still carry some shock power when done well (i.e. with a "banality of evil" spin), but everything from there to the '60s has now been re-elaborated in every possible way and is so, so tired.
What about time-travelling our way out of the '70s oil crisis? What about the Seattle G8 turning to revolution? There are so many focal points of recent history that would be more interesting and fresh, even including goddamn 9/11, that the thought of seeing another US/USSR/Nazi 1940s' uniform fills me with dread.