Well, Brawlout has four guest fighters from Guacamelee, Hyper Light Drifter, Yooka-Laylee and Dead Cells.
That looks promising. Will keep an eye on it, thanks!
It's not quite Smash, but Runbow has Lilac, Shantae, Shovel Knight, and many others :)
Yeah, recently picked that up. Gonna give it a go next chance I get!