Speaking of a "own Crossover Fighter" We really need some smash spinoffs focused arround Mario, Zelda and the like! With only one franchise and maybe 1 or 2 fitting guests (from obscure nintendo games) Sure those games wouldnt be as hype but its the perfect way to please certain smash fans!
Honestly a zelda smash would make me happier than 3 zelda characters in regular smash!
This is still the future of Smash I want.
Have the base game "Ultimate" with the current crazy roster. Just make it so it can import up to 75 characters from "other Smash games on the console's memory."
So Switch 2 comes out.
Ultimate DX comes out close to launch (add the dlc, add some echoes, add the mii costumes, add some stages.... And if you really want to get easy sales, just pop back in a port of Subspace Emissary.)
Six months Later "Smash Bros: Mushroom Kingdom" comes out with a a predictable amount of overlap characters... but also just way more mario characters (that can be imported into the main game after unlocking them) and a single player similar to Melee's Adventure Mode (basically some platformer levels to evoke the mario experience)
Six months later: "Smash Bros: Hyrule"
Six months later: "Smash Bros: Space Mercenaries" (Metroid, Star Fox, Kid Icarus, and F-Zero)
Six months later: "Smash Bros: Pokemon"
Six months later: "Smash Bros: Tactics" (Fire Emblem, Advance Wars, solo play mode is an srpg/fighter like Project X Zone)
And so on.