From the prior progress reports + the newer one, it does seem like P3 is focused on finishing the interlude. The girl with the long claws from that section gets a boss battle, apparently the ghost girl from that section also gets some content, and IIRC he mentioned that it's the last part before the story moves onto the next succubus (though also IIRC there's a Vidhna update coming after this one)
Also other stuff like Maven content, a new mob character, and apparently that new girl in the lattest progress report. Maybe also other stuff that he hasn't shown, as usual.
Teary hasn't said anything at all in the discord since he posted the progress report (though he reacted with hearts to a fanwork, so they're alive). I'm *guessing* that it's dropping this month but who knows.