Yesterday, Sakurai give his thought on the ps5 in his Famtsu column. You can read it
here. While I know that if Sakurai play a game, it doesn't mean that it will be in Smash I find it interesting that the first ps5 games he played is Ninja warriors. For those who don't know it, this is a 2d beat em up game where you controll a Ninja (think a bit like Streets of rage but with Ninja theme). The game is developped by Taito. The version he played his probably the 2019 version called
The Ninja saviors: return of the warrior. This his the only game of the franchise that would be playable on a ps5. The japanese name of the game his actually simply
Ninja warriors, so this could be a mistranslation from the team. This version is a remake of the SNES game.
I find it interesting because for him choosing this particular game for his new next gen console. While I don't think this particular game will be represent in Smash. This bring three points:
-Sakurai his probably a fan of ninja in general. This is what I think because when he chose a gen 6 Pokémon based on concept art, he chosed the ninja, Greninja. Also, when he talked about who he considered for the Arms rep, he said Ninjara. Now his first ps5 games is a Ninja game. Maybe he would like to add Hayabusa because he like Ninja that much.
-This is a Taito game and while it probably isn't that surprising, he probably have a lot of respect to their game. It was already speculated that we might see a Taito spirits event and it is know own by Square enix so maybe it could be add relatively easily.
-Maybe he's also a fan of 2d beat em up in general, which might help the case of other more popular beat em up characters like Axel Stone or Billy and Jimmy Lee.
Just to be clear, I don't think that those characters are a lock or anything, but considering that he chose that particular game for his brand new console, it's probably a game that he like a lot, so it's something to think about.