While Dante has definitely a lot of material and possibilities for a moveset, that doesn't mean he will get everything he has in his games if he gets into Smash. I mean, Bayonetta also uses multiple weapons and she doesn't have any in Smash beyond her signature guns.
It will depend in how Sakurai decides to approach Dante, assuming he's in. Maybe he believes that his sword and his guns are enough to represent the basics of Dante (with a Smash moveset it's very difficult to cover everything he has), and he decides to focus in other things instead, like Devil Trigger, which would probably be the potential gimmick of Dante easier to translate into Smash.
I mean, in my headcanon it's pretty obvious. People always have talked about Dante and Bayonetta making a crossover, and with both being big hack n slash characters, it's a natural thing. Plus both characters were created by Kamiya.
The funny thing is that Bayo would probably be the dominant in their relationship, while there's a constant meme of Dante not knowing what is sex, which is funny when you think of Bayo's attitude and all lol
Also. Joker LITERALLY uses Rain Storm in Smash Ultimate. which is a Dante move, reinforcing my headcanon lmao. Bad quality gif incoming: