Geno is now or never, but TBH even with that I feel personally that the odds aren't too high.
He has Sakurai admitting he was interested in putting him in, but apathy from his parent company Square Enix combined with his incredibly niche appeal and appearance in a grand total of...one game, with a cameo in one that got removed in a remake? I dunno, doesn't seem to me Nintendo or Square are that interested, and given Nintendo are the ones calling the shots with DLC in the end, I'd be surprised personally if Geno even crossed their minds. I really feel Geno's only true shot is if Sakurai himself pushed for it and got Nintendo on board, because I've gotta be honest, there's not much going for him in my eyes other than that.
I could be wrong, of course: This is just all my own speculation looking at the current trends, but if I were a Geno supporter, I would hope for the best, but definitely prepare for the worst.