The teaser as armion showed is 100% Galatea. Not some kind of sneaky bait and switch with power girl the update goes on to say its an easy one anyway. People are pointing to Harley 2 but the thing that nixes that is Sunset always enjoys throwing a surprise character or curveball in most of these updates that typically isn't teased. Crush was only teased because of how, even for the delay happy dev, unusually long the last release took to get out. The original intent was to tease Huntress and Canary and throw Crush as a slider we wouldn't expect. Harley 2 was not hinted at all for her release and was a surprise for the changelog.
Just from guessing about the first teaser, this update may just be mainly finishing off characters that are halfway done. So maybe something like Galatea, Blackfire, Superwoman (so the only henchwomen left are Mercy/Harley's spaghetti code) with Starfire and maybe one new one thats 0->100% like Zatanna.
