Analysis of information sources in references of the Wikipedia article "Marvel Studios" in Vietnamese language version.
...despite obtaining the cinematic rights to make Hulk movies, Marvel did not obtain distribution rights. Universal held those rights... the exact situation is that Universal currently retains the right of first refusal to distribute any Hulk films in the future. If for some reason Universal chose to forgo distribution, then Disney would immediately pick up the distribution rights for the Hulk movie.
In a shakeup in its command structure, Marvel Studios is being integrated into Walt Disney Studios with president Kevin Feige reporting to Alan Horn...
...despite obtaining the cinematic rights to make Hulk movies, Marvel did not obtain distribution rights. Universal held those rights... the exact situation is that Universal currently retains the right of first refusal to distribute any Hulk films in the future. If for some reason Universal chose to forgo distribution, then Disney would immediately pick up the distribution rights for the Hulk movie.