I think there is no reason to keep holding onto the MGM name any longer. Its loss would simply mean the loss of the GMR. Everything else in the park has nothing to do with MGM. Considering Imagineers have publicly acknowledged that they are already active in the lengthy process of "re-imagining" and updating this attraction, its no big deal. Disney/Touchstone, along with its other film studios (Miramax/Dimension), now have a line-up of their own successful live-action and animated movies to fill out a very good updated version of GMR without going through really old classic films that very few have probably seen. Assuming all things remain ok with George Lucas, the whole Indiana Jones/Temple part in the GMR can stay too. I don't see where keeping the MGM name helps anymore (of course, beyond the fact everyone calls the park "MGM").