Bellator is serving up a double helping of MMA action this weekend as Mohegan Sun Arena in Uncasville, Conn., plays host to back-to-back shows on consecutive nights with Bellator 231 and Bellator 232. The first of the two events features a main event between two of the most experienced members of the Bellator heavyweight roster, while a former world champion looks to move one step closer to his old title and a clutch of rising contenders aim to position themselves for bigger things ahead. Here are five burning questions ahead of Friday night’s fights. **** Will Frank Mir or Roy Nelson bounce back into the win column? Frank Mir at Bellator Hawaii workouts. (Bellator MMA) The Bellator 231 headliner sees two of the most recognizable names on the roster go head to head in a battle of seasoned veterans as former UFC heavyweight champion Frank Mir takes on big-bearded, heavy-handed Roy Nelson .