While we could get some change to the main screen section in this short a time, as I say at the end of that story, it's more likely that any other rumored BIG changes will probably have to wait until after The Mummy coaster refurb is done next year, (or may just never happen).
I'm trying not to get my hopes up... but I want to believe they secretly filmed something new for the ride to update the story and add more characters for this quick refurb though. We can dream.