i.e - A lvl 100 arena need to be full withing 4 hours or at least 1/2 the participants
If within this time limit it is not full or not at 1/2 the participants then it is canceled and ppl are getting their gold back.
If more then 1/2 but not full, then the last to enter get the refund and battle starts
This way the battles will change more rapidly
( time can be based on level, or type of arena ( i.e - item, gold etc ))
Hmmm, thats it i guess

