Where is my Marvel Ultimate Alliance 2 (MUA2) DLC?

You should first make sure it, once again, that it's not the compatibility pack; because I've seen people make that mistake multiple times. If it's the correct DLC, move to next suggestion.

Second, try and re-download the DLC. If this doesn't work, move to next suggestion.

Third, you may not have access to the DLC in the United States; I've seen multiple people say it works in other countries, but not the United States.

Are you just downloading these items for the first time ever? If you are...then the only thing you have access to IS the compatibility pack since the actual pay DLC has been removed long ago. (since they no longer have the rights to it)

If you did buy these DLC packs years ago and you did manage to delete them from your HDD, you wont find them again in the marketplace...you will have to use your download history in order to redownload the removed items...but be warned. Sometimes items are also removed from the history and that will also prevent you from downloading them at all.

You might have actually downloaded the compatibility pack, and since they're both called the same things on your hard drive, it can be difficult to tell which one you actually have without checking your Download History. Take a look at the Store page for the game or sift through your entire Download History to verify which one you have. I was actually in the same boat as you for a while where I thought I had purchased the full DLC but then it turned out I only had the comp-pack.

This is ***. This licensing thing is just bogus. As other people have stated just because a license expires on a toy in the store they still sell it for a profit. Playstation just had theirs come off the network in 2014. We are getting screwed because we cannot finish the game. They will only make money off the deal, if they were actually as business savvy as they claim then they would listen to their customers and put it back renew the "license" and get over themselves. I have already called activision and suggest that if you actually want to see this return you do the same. I would also say to call xbox and let them know you want to see it again.