Injustice gets DLC.....except on Wii U

[Lostplanet22]

Darc Requiem said:

Smeags said:

Hopefully Wii U owners will get to have the chance to purchase the DLC content down the road. The whole DLC issue (and not just for this game, but for others such as Black Ops II and Most Wanted, among others) is really is becoming somewhat silly. Your game is already on the system, and you have customers eager to give you more money for already created content. What's the issue?

That's what I don't get. The game is already on the plaform. The DLC has already been developed. They are passing up free money. I

Only thing I can think of really is the cost of putting up DLC on the Wii u store.  If a small update already can cost you easy 10.000 bucks how much could it cost for putting up DLC?  And how much they need to sell before they make money?