I'm fully aware of the life of a fighting game (I play SF, SC, UMvC3, MK, SFxT and hopefully TTT2 and KOF soon), and BTW I think that UMvC3 worth it since it had plenty new characters, few more stages and the mode H&H in free DLC, that makes the real 1 player mode.
But I'm against the "let's make several DLC with things that could be bonus" state of mind, and if I succeeded to not buy SFxT (and a lot of non-fighting game) for this, and several DLC that do interest me in UMvC3 particularly, I will succeed to not buy any of Injustice's one if I choose to.
The thing is that most of player see DLC as a bonus for the customer, but I see it as a malus for people that can't buy it (or who don't have online). Few years ago additional missions, bonus characters and alternative outfit were to unlock not to buy, by doing some specific actions for example.
Now they just make additional content that could be in the game but no, if people are ready to buy everything why give it free ?
For finish I precise that I talk about "little" DLC like costume, map, sometimes characters, missions, weapon or even part of history. I don't talk about big one like TBoGT and TLD for GTA4.
Seriously last week I saw my little brother buy a season pass for AC3 30 freaking euros ! How can people accept to pay the price of full game for additional content, no matter how bad you like the game ?!