I'm always up for more kostumes... ALWAYS
DLC... I'll like some new ones or some cool guest char.kharacters, becuase I'll be honest, I dont care for anyone post UMK3, and the ones that were kinda cool, got in, (Kenshi, Quan Chi) I'm still trying to figure out where the love for people like Tanya or Tremor came from all of the sudden.
It will be cool to see them cook up some new bloods if at least to test the waters for MK10
Also... stay FAR away from a UMK9, take all that time, money, effort toward a new game instead of a slight improvement that only a small piece of the crowd will care for.