Thinking about it, an android could be a scary villain for her. Similar concept of it has power, but she can't absorb it. Or at least not fully, her interaction with R.O.M was questionable. Anyway, she fights Sentinels all the time and technically Karima is kinda what I'm thinking, but I meant more like the androids from DBZ. Someone with a more human appearance and personality like Android 17, 18 or even a monstrous one like Cell.
also DCs Parasite from My Adventures of Superman had a similar look to Cell I think
Mugan flashbacks, clearly my thinly veiled attempt to bring 18 vs Rogue to life in the books lul
Technically they do have the Reavers and Omega Sentinels to fill that niche anyway, but those tend to be bit more obvious then how the Androids could just blend in.
But I like the powered by tech idea. Alternatively, a magic-powered villain could also be fun. Maybe another Juggernaut / cytorakk user? I know Cain is basically redeemed, but whose to say there can't be another one. Rogue having a personal villain that is a gem-user could be fun.
Powerhouse! Yes, I think she'd be a fun villain because they have a lot of appearance and power overlap. A big white streak, the lightning emblems reminiscent of Captain Marvels old costume or alternatively Storm, the flying brick power-set with absorption capabilities... honestly the similarities kinda give off chimera vibes tbh. We don't know a lot about her origins, maybe she could be connected to Sinister? IDK maybe that is a reach lol. Though she has been portrayed as a bit weak, she basically got owned by Beast and Wolverine iirc, as been pointed out to me before. So she'd need a power up ironically.
But yeah, she's a fun character I'd love to see Rogue interact with as a antagonist or maybe even ally.