Frankly, I don't worry too much about the whole mega final smash thing since in the end, most of the time I'll just play without items, since it's not like I have a lot of instances of playing with four people.
Unless we organize AP Forums Smash Bashes. Oh man, we should totally do that!
Yeah. Even Project M 1v1 stuff right now could be pretty fun, too. also good practice for my first tourney coming up in end of March, though I doubt there are enough people dabbling with that here to organize something.
But yeah, it's pretty much a guarantee to throw something to smash around with when smash 4 comes out.