>>43826311It can't leak unless game journos are given access to it for review purposes.
If there's any new pokemon or galar forms or evolutions in the DLC we don't know about, then we're all going to be discovering them at the same time. (I expect there's more than just Slowbro at least, but not that much more) Multiple people all scream-tweeting about a new pokemon they just found in the DLC is GREAT advertising.