Ed Boon is still making these games right? Then ya, MK10 is gonna be different then MK9.
What if some characters could jump higher than others?
Injustice already has different jump arcs and different jump attacks, it would be weird for NRS to go backwards for MK10
What if each character had different amounts of life?
Paulo has mentioned in the past he doesn't care for this idea, so I doubt we will see it.
What if a few characters didn't do chip damage because their hitstun is so powerful (or instead they don't build super meter from hitting a blocking opponent)?
That's... I don't see why those would have to be connected.
What if some characters built super meter from actually hitting their opponent?
Character specific meter building is something that should happen, and sort of already in Injustice.
What if you could choose from 3 different types of super meters (you could choose to have no combo breakers in exchange for much more damage/armor on EX moves)?
Alpha 3 does this, and it was cool, but I don't see NRS going that route, but they do need to do something about breakers.
What if each character had wake up-only attacks?
That might be kinda neat? Maybe each character has one specific wakeup only attack, and its pretty strong, but it costs half your meter to do it?
What if one character couldn't even jump, but he could run?
A few characters having a run instead of a dash would be cool, but the jump thing is a bad idea.
What if one character had projectiles that traded?
All projectiles should trade, unless its a very unique weird one, NRS Loony Toons style zonning is getting really tiresome.