Well, after seeing the latest snapshots, I'm sure that Mojang is wrapping up 1.20 real soon. That video teasing about a new boss may have just been a joke given its release date. It's not as official as a Minecon announcement or a Twitter post, and Mojang doesn't always keep their "promises". They may have been making interesting stuff for 1.20, but once they've won the crowd back, the developers will get back to teasing them with fake news.