I really don't think they'd invest in the refreshed version of the show (and what I've heard are moderately substantial environmental things that needed to be addressed inside the theater) if they weren't planning on it being around for a while.
So I suspect that Walt Disney Presents/One Man's Dream and Mermaid will remain basically as they are.
Makes sense. I am personally hoping for an area themed to Disney Animation proper. Maybe this can be WDW's take on Avengers Campus with a catch all type land that can be updated as time goes on.