Yeah I'd wager we at least get the beta before summer next year. Probably in either next league, or the league after somewhere.
Edit: Although who knows if it's going to be a Beta, like there's 3 acts available, it's a voided side-mode to normal PoE, etc, or if it'll be a "Beta" where it's integrated with the main branch and we start getting many, but not all, PoE2 features in PoE.
It does say "beast seed"
Seems like our old pal may be in need of a fresh proctology exam in PoE 2.