[[WMG: Future Season themes.]]
* Well, let's start with the obvious: the Bowser boards, with Waluigi's Island and...let's go with Clockwork Castle filling in on the games that don't have it.
** Waluigi's Island and Clockwork Castle already got played, but it is hinted in one video that the final season will indeed be the Bowser boards.
* Jungles, with possibly Creepy Cavern filling in on 3. Don't know what would fit in 5.
* Space/Stars
* Cutesy stuff

[[WMG: If they LP Mario Party 10, Mr. Doom will be Bowser.]]
Finally, he's the ultimate freakin' cheatin' stinker.
* Alternate option: Reverend Inferno, under the pretext of Bowser collecting for Waluigi's Polio Fund. And he's been popping up again, in the Randomized Emerald Nuzlocke challenge and the 2000 Subscribers Video.
** Mr. Doom did indeed play Bowser in the one Bowser mode game they played. No word on if they'll do more. (They didn't exactly like the game, barring Amiibo Mode.)