yes, but I mean now. The wait is unbearable by now...
what if Miiverse stage will have every song in Smash? everytime we fight on it, we listen one of these songs randomly.
It would be much better than having some un-iconic music related to pichtochat or something of this kind.
After all, in Miiverse there are groups dedicated to all Nintendo series!
I want Mewtwo now as well... I am starting to give up on Smash 4, yet I always hold on to the thought that Mewtwo will make it better, that Mewtwo will make me care again. But, if they continue to starve us like this (especially if he gets delayed), then I might just give up on the game anyways.
As for the Miiverse stage, I think that it should have the most songs out of all of the stages (about 40), yet as opposed to those being songs that we already have in Smash 4, they should be songs from say, the Mii Maker, and they could have a
Mii Maker Medley where they combine all of the songs from the Mii Maker (like Menus, Create a Mii, etc.) and fuse them into one big mix. They could follow this trend for other games (like Nintendo Land, Wii U Menu themes for the lolz, etc.). And as one last bonus, you should be able to customize the appearance of the Miiverse Stage, so they could be an editor so you can change the colors of the stage/background (or make an animated background), but the model would have to stay the same, and maybe perhaps when you go onto for anyone, you could have more simplistic designs to choose from so you still get customization, but it's something that both you and the opponent could have without creating complications.