Kind of a controversial opinion, but I don't think inverted coasters are that exciting to be honest (mind you, I haven’t been on many, Nemesis is awesome though and is far better than Nemesis Inferno).
I'd rather parks to go for newer designs such as the RMC Raptor or S&S Axis.
Just spoke to the person who runs the fan page for the Thriller / Tsunami coaster on Facebook. The coaster has not been scrapped yet, and it might not be its end:
As of 21st March 2020, the track is still on site, if you look at Google Maps.