With all of the rumors circling around the possibility of Injustice 2 and the monotony of the past few months of MKX, I think its fair to speculate what we think can work in Inj2 that either existed in MKX/IGAU or something new altogether.
A feature that I believe would benefit Inj2 that many games in general utilize - namely SFV and League of Legends - is a ranking system within ranked matches.
These ranks are most recognizable in games as Bronze and Silver for more casual gameplay all the way to Platinum and Diamond for the competitive beasts that we see at tournaments.
I believe, opposed to the simple bronze-diamond ranks, it should be more DC Comic related...using Superman's weakness, Kryptonite, as a rank amongst others.
Not only will this increase the competitive play that many top players don't get from Ranked, but it also gives Bronze level players the chance to level up and potentially become those Platinum and Diamond level players.
I believe a ranking system in ranked will add a new drive and new life to an otherwise bland and simple ranked play. This coupled with the hope of GGPO returning for Inj2, NRS online play could be at a new high - potentially surpassing any other fighting game.