Well, Momotaro's Railroad is up to it's 16th sequel....
But I have an idea for a Mario Party that'll finally break the mold. Mario Party DS to be exact. I was thinking it would have all the Minigames from the first three parties, as well as a few new ones, all with the touch screen incorporated into thier controls. As for the main game, I was thinking they could replace the dice with a card system, sorta like Sonic Shuffle (which was an abomination, but it wasn't for a handheld with a touch screen) where you can play against up to 7 other people via Wi-Fi. The boards would have to be really big, though. Plus, they might have to change the minigames around to accomidate 8 people, unless they use some sort of mechanic where one set of people moves around while the other plays a minigame. Maybe that could help shorten the game time as well as allow a whole new level of strategic play. This could be the Mario Party that eveyone actually likes!