Mir looking good and the knee seems fully recovered. I think Mir has the physical tools to defeat Lesnar but I sense a mental weakness. I'm not sure he believes he can win.
Lesnar looking like a beast on the takedowns and GNP but looking like a robot on his feet throwing punches. Boxing is not something one can become competent at in 12 months and it shows. Lesnar's biggest edge is his mental toughness/confidence.
Bottom Line: Mir's only chance to win is to keep the fight on their feet and KO Lesnar with a punch or high kick. A single counter-punch to the face from the 260 lb Mir should be enough to put Lesnar down and out. If Lesnar even thinks about boxing, he's dumber than he looks. Mir will get a few chances but if he swings and misses badly, Lesnar will dump him on his back and Mir won't be able to do anything with Lesnar on top. Lesnar is too powerful, too quick, and too smart to get submitted. Lesnar by GNP R1.