So been thinking, with this Mario rumors, everything
Fatmanonice
has been saying, my gut, and a few other things, i think we have a good idea what could happen. This last FP(assuming this is the final, FP3 may be a pipe dream atm), may be both a mix of things Sakurai wanted in the base game, along with fan requests, and some freebies.
Here is what i could see happening. Not the exact order other then the first 2 of the FP.
FP6: ARMS character. I am banking on either Min Min, Ribbon Girl, Spring Man, or a hero situation of Spring Man, Ribvon Girl, Min min, and Ninjara.
FP7: Geno. This comes during the June direct which is looking like Nintendo is pushing Mario hard this year for his 35th Birthday. Geno seems to be a good character to add to the pass for this. It checks 3 hits: a promotional pick, a fan favorite, and someone Sakurai has expressed interest in the past.
Extra 1: Waluigi. Announced on September 13th, the day of Marios Anniversary, as a free gift for the week, then paid separately, to celebrate the anniversary.
FP8: Shantae. I know people feel indies wont get anything but i disagree. I think we will get 1 playable indie and she is it.
Extra 2: Medusa as Palutena echo. I think we will get 2 echos, along with 2 unique extras. Medusa should be a fun echo and doable as Sakurai worked on the last game, and they can use assets from the last game for 1 of her moves(heavenly light called netherworlds darkness)
FP 9: Rex and Pyra. The other character Sakurai wanted in the base game along with ARMS but timeing dashed the chance. With ARMS happening this is certain.
Extra 3 : Impa as an echo of Shiek. This can tie into eother BotW2 or a remaster of skyward sword. Zelda does deserve another rep and impa is a perfect free echo choice.
FP10: Crash Bandicoot. Most likely revealed at next years E3. The final of the big mascot war of the 90s. Fan requested as much as Banjo and would make this game an extreme crossover.
Extra 4: Iwata tribute. Fatman seems set on this happening, and i can see it. Could happen on the anniversary of his passing. As of who it could be, its either Balloon fighter, one of his first games, or Lolo and Lala, from one of Hal Laboratory earliest games.
FP11: this one i am just not sure. It could go multiple ways. It could be that Rumored Ryu Hayabusa, could be a Bandai Namco character. Could be a capcom character. Could be Doomguy. Or it could be tied to a Nintendo game, maybe a hopeful Golden sun Revival...
And thats my thoughts. I think a geno and Rex and pyra are a shoe in for sure. The others are good chances for sure.