Furi confirmed in her latest stream that Pixel was going to have an "Invaders" Gen for Gen 3 (PixelRevival) - and she was going to be one of them. 2:55:00 onwards if the timestamp doesn't work:
Apparently, the other girls had already signed on but she couldn't because of the whole IP issue with VReverie. Apparently, Pixel was directly negotiating with VReverie for her IP while that situation was ongoing but VReverie ghosted them. Pixel gave them a whole pitch for the gen, with 2.0 models, promo materials, basically the entire debut package, plus content ideas for a whole year after debut.
Furi also confirmed Tora's health issues but without elaborating further (she double-checked to see what was public in the announcement). She also said that she didn't really know anything about the IP situation of the other Pixel girls.
She withheld saying anything about the "Invaders" gen until Chiaki got a proper send-off and Raki completed her IP donothon. As to who the other girls in PixelRevival were, she couldn't say, so it's a matter of speculation at this point.
Furi eventually signed when she got out of VRev purgatory, and she's still here, so I suppose the other girls are fine. I've seen some speculation on /vt/ that at least one of the girls is Puri (formerly Momoko of NEXAS)