Tyla will be on a KTM next year, but on a factory 450 back in Europe.
Wil Hahn has a ride next year as team mate to Eli Tomac out of a 2nd Geico semi. Although Wil has a 125 he's rebuilding for himself I don't believe he's raced a 2-stroke since super minis.
Realistic guys who would be willing to ride 2-strokes for some money and score points in my opinion? Robby Marshall (obviously), Jake Canada, Vince Friese, Cole Thompson, Mike Lieb, and Austin Howell.