Superhero cheers could be a fun time.. Dear god, though, bring back the Tick
I could kill for that in the right concept, but that could be done well.
The others sound truly terrible.. not creative at all, very lame. (Dentists become astronauts? How long can that concept last before it goes very stale, when viewers realize they will never go to space out of budget issues.. and the fact it'd end the show..)