The Bernie wing is more likely to win, but I fear that it won't even be the Bernie wing. It'll be the Green Tea Party wing, which could lead to a candidate like Kanye winning the nomination in 2020. Democrats have moderates, they have liberals/progressives, and then they have some crazies. Crazies took over the Republican Party, and if enough anger builds, I'm worried that the same thing could happen to the Democratic Party.
Democrats need to keep their super delegates. This is exactly why they exist in the first place.