If they are getting rid of the Great Movie Ride, why would they keep the Chinese Theater? They way the parks are becoming all about promoting IP's they own the Chinese Theater seems to not fit in so well with that. I think if they are looking for an iconic structure for a park about "Disney" movies, it be animation related... maybe something like this building?
This was built a few years after the MGM Studios opened, but Disneyland Paris' Studios has a version of the Roy E Disney Animation Building
or maybe some version of the original Disney Studios to tie in with the 1930's Hollywood theme, if the build is going to now house a Mickey Mouse ride this might be a more fitting facade