I do not think there will be any mention of future patches other than 10.2 today. They need to save something for BlizzCon, and it makes sense to go over 2024's roadmap there. There is likely to be even more encrypted content in 10.2 than there was in 10.1.7, so they'll have no rush.
That said, I would welcome something entirely unexpected tonight. For example, instead of simply going to the Emerald Dream to face off with Fyrakk, they pull the rug out from under us.
Scenario:
Fyrakk is seen breaching the barrier to the Dream in a cinematic. But as he does, Life magic just completely envelopes him and crushes him to death in seconds. The tree has become so powerful, it is getting out of control.
We're given a 10.2 cinematic (a real CGI one) where forces of Life suddenly begin emerging from within the Dream. Appearing all over Azeroth. Sort of feral versions of creatures you'd expect to find in the Dream. Maybe Botani and stuff, too.
Guardians of the Dream becomes unexpectedly a patch where we need to restore the Dream to what it was, tranquilize it.