X-Men: Start either Brotherhood or Hellfire club multiball (or both) - We played Xmen at Mike Luc's place I'd like to note have to repeat games if I don't have to, we did collect any 3 Xmen Characters
CV: Get any three marvels in a row on the diamond (worked well last time) - That one is good, but no CV's at any of the locations
NGG: Score a hole in one (either natural or from the wheel) - Way too hard, you would end up with a ton of 6's and a bunch of frustrated people
Whitewater: Get 5x playfield running (not necessarily in MB) - Eh, maybe, I'd be more apt to say start Big Foot Hot Foot as that is something most people don't try to do
TZ: Start powerball mania. - Eh, problem is depending on the TZ you might have to play a ton of pinball to get the powerball out if it is say 3 gumballs deep. It's also unfair if one player has it closer then the other, or what if a player drops it on ball 5 and the next player gets it served in the shooter lane, much to much randomness to make it fair.
JM: Start Yakuza Strike - Yea that could work, but if I used JM, I'd say collect X number of video tiles
TSPP: Reach Springfield Mystery Spot - WAY to hard, I'm sure there are players who own the game who have yet to see SMS