Yeah the original rumours were an RMC Raptor, an S&S Coaster which would be a follow-up to Maxx Force (so this does makes sense as the next S&S coaster in the chain) and a Premier Coaster project, as well as Zamperla family rides and a Screamin Swing.
SFMM - RMC Raptor
SFFT - S&S
SFOG? - Premier Rides
That's just my idea anyway. Maybe the RMC Raptor doesn't include the SFMM one since we knew that already so maybe a Raptor for SFOG.
I remember a Prototype Raptor for SFStL was also planned, so maybe the SFStL Raptor will materialise in 2022?
It’s also worth remembering that a fair number of Six Flags’ 2020 projects are still being delayed to 2022; at very least, I know that both Aquaman Power Wave at Six Flags Over Texas and Sidewinder Safari at Six Flags Discovery Kingdom have been delayed to 2022.
In terms of SFFT’s project; the S&S Axis wouldn’t surprise me at all. The ride type seemed very “Six Flags” at the time of its announcement, and SFFT has often been a testing ground of sorts for the company, so I wouldn’t be at all surprised if we do see the first ever S&S Axis coming to SFFT in 2022, especially given that the stock model fits the space being cleared perfectly.
I have an alternative suggestion, however; could this ride, or at very least one of the Six Flags rides opening in 2022, possibly be the record-breaking Gerstlauer announced a bit back, due to open in May 2022?