SL will be the last expansion. I suspect that 9.2 will be 2022. I think they might update it and then do a 9.3 taking SL into 2023. However they are just going to then do WotLK Classic and live off D2 and old games. This version of WoW had a good run.
During this time they will be working on new projects and have heavy stock in D4 and likely will work on the next MMO. Whether it is WoW 2 or not no idea let be serious at some point they need to end this version of WoW no better time then now at it’s worst. However something has to happen as the ideas at Blizz have ruined the last several expansions every step of the way.
I originally thought SL being the last expansion was only a 10% chance but with how things have gone recently Imma bump that up too 40% chance SL is the last people get and well makes sense since it’s a dumpsterfire and they need to figure out how to make a good game again.