Confirmed on Wikipedia Possibly Released August 16 or 21 2016:
Vini Vidi Victory vs Rolf The Reaper
Gill vs The Lost Viking
Cleat Cunningham (reigning Champion) vs Corbata (will probably lose)
Royal Thumble: Hometown Huck and James Montgomery Flag vs Scoutmaster Scott and Big Bad Billy Goatestsky (and probably others)
Expect Mr. Extremo, Danny Kaboom, Pierre Pamplemousse, Gogachog, Knockout Ninja, Senator Skull, The Big Time, Itsy Bitsy, The Visitor, Billy Batboy, Scoutmaster Scott, or Mugsy Thumbscrew to either appear or fight in this season as well.