Yees that was what I had in mind.Siegfried would most definitely be the one based on his SC2 alt, mostly because the only time Siegfried has the big meaty claw is when he's Nightmare.
Is Incineroar viable? I honestly usually forget the character exists nowadays, lol.But with that said, I could see the devs treat Nightmare in a similar way to Incineroar; slow, but his frame data is faster than you'd think (though not brokenly so), so he could effectively work as some kind of berserker character.
At the point where Ryu gets two clones and SF gets four characters I would at least hope most of the other third-party series have expanded in somewhat commensurate fashion.I think that Chun-Li and Akuma should be the next two fighters, with Chun-Li being based off of her Street Fighter III: Third Strike incarnation since that's where she seems to be the most prominant, and Akuma being another semi-clone of Ryu.