So it seems like ROTM will stay intact for a pretty while, which allows Universal to take time to develop a replacement for the attraction, maybe a DK-style indoor ride. I'm really intrigued at the idea of a DK-style roller coaster when the Mine Cart simulates the jumping cart like you see in the DK Country video games back in the 1990s. Hopefully, by next year in late 2019, we'll get an announcement of SNW Hollywood, two years after SNW was announced for the Japanese version.
If they were looking to announce SNW two years after the Osaka one was announced, it would be by this December (as it was properly revealed with concept art on December 2016).
If Mummy is staying, I vote for the original ending to be finally reinstated, as that was a great use of effects IMO.