Here is something cool i thought about that Kings Island could be thinking:
The Beast opens in 1979.
SOB announced 20 years later in 1999 & opens in 2000.
Possible RMC announced in 2019 & opens in 2020, which would be 20 years after SOB was built.
Also with the early teasing, we may get an early announcement on 6-19-19, 10 years to the day that Son of Beast closed for good.
This all might sound a little far fetched but you never know!