All they will need is a canopy over the ring, **** the people. Been done many times. Looking forward to it. Haye by KO!
I have been in an arena in the middle of summer before, and even though I was wearing shorts, gulping 32 cups of limonade, I still felt like I was gonna take a stroke. I'm sure they'll have fans in there, and some sort of dehumidifying sytems surrounding the ring, but July is really a poor month for outdoor fights. Sept would seem more plausible.
MMA isn't as old as boxing or as popular in Europe. Germany is Klitschko crazy and they have huge enough stadiums to generate that sort of money.
canopy over the ring, the stands look like they are already covered, so only the folks that put out the cash for floor seats will get wet, but they can afford a raincoat