Is that V3 or 4?
The Hulk only appears for me with V4 and M4 and not with every texture/character pack, it's normal with all the others!!
For instance ericfarris characters work fine but rebelmommy's don't, but there are significantly more that don't work than do!
e-on have admitted to a problem with this so I guess you're just lucky eh!

Injustice will be avenged.
Cofiwch Dryweryn.