I think he might have been referring to that Justice League movie from a couple posts earlier. There are a bunch of clips on YouTube now, but no real process. Here's pretty much the whole scene with the cyborgified and brainwashed Justice League, including Wonder Woman, Mera, and Starfire.
https://www.youtube.com/watch?v=Ujzu3w8rF5o
https://www.youtube.com/watch?v=sEe2kCf3T78
I suppose I would be remiss if I didn't mention that there actually is a TF/possession with process in this movie. But it's a male TF; Superman gets possessed by Trigon. I'll post it here anyway - maybe it'll inspire the creative types on this thread
https://www.youtube.com/watch?v=aIshohDJNW4