I reject this rumor
First of all, I really don't see how they could accomplish this either as an overlay OR as a complete retheming, short of knocking the hotel down and starting from scratch. The building is incredibly iconic, and I don't believe that DLR demographic (largely locals) would EVER be able to see it as anything other than the tower with a cheap coat of paint over it if they went this route. And they are going to shut down one of DCA's most popular rides for an extended refurb right before Christmas??? HA!!! I doubt it! And they are going to introduce Marvel into the parks with a relatively minor character, the Collector? Wrong again. They are going to completely forsake the Old Hollywood theming that they just spent millions of dollars on rehabbing Buena Vista Street by plopping an enormous beacon of a space alien age modern franchise right there?? NO!!!! (seriously ToT is a huge building)
I have read that Disney's licensing deal with the Twilight Zone is due for a renewal soon, I think this is their way of getting a cheaper deal somehow. I do agree that the Hollywood backlot needs some serious help, and I wouldn't mind Marvel in DCA in some other capacity. How about letting the imagineers run wild, and create something original and amazing for this new franchise? But this idea is just plain wack from A to Z. It makes zero sense.
Maybe I'm in denial, but if this happens, just...gosh I will be so sad. This ride is not outdated, it's not lacking in crowds. In fact it's the exact opposite, a fan favorite through and through, constantly commanding one of the longest lines in the park. The theming is second to none and matches DCA in a way that no retheme could possibly rival. This would be a huge mistake on Disney's part.