Gonna go out on a limb and say Gary McCoy. Count him in as a dark horse.
I've heard he's been setting some damn good times on his 500. I'm guessing the 4 stroke boys will take some time to come around. I hear Gary's got a better tire this year and isn't sliding as much (too bad cause it's fun to watch) but he has been lightening quick and has outpaced the 4 strokes.
I just wonder if Gary can come back from breaking his leg. Last year when he hurt his ankle he never really got back into it. Hopefully he can come back from this. I love to watch him slide his yamaha everywhere