Another Hasboro property that, due to rumors of them wanting to cross over the two properties, is speculated to be th "Last Knight" that the title of TF5 refers to. He's basically a ten to sixteen-foot tall robot from space who shoots lasers at bad guys and his personality depends entirely on who is writing him at the time. His first non-toy appearance was in Marvel Comics, back when they had the licences to basically everything. He met the X-men and the Avengers, fought Godzilla, and may have even met Doctor Who. I am not 100% certain of that last one. I know there was a lot of cross over back when Marvel UK was publishing the Doctor's comics. The Doctor even had a few run-ins with the Transformers, and Godzilla as well. Oddly ROM and the Transformers never crossed over in those days to my knowledge, but it may be because I don't think Simon Furman, the Transformers writer at the time, liked ROM very much.

Also there have been several excellent Transformers smut authors over the decades, pretty much ever since the first cartoon was on air, but that's a topic for another time.

For instance, Celestia hasn't got her jubblies out. =]

However, given the timeframe of the Transformers movies...

It would have meant using G3 ponies as a basis.

Any explanation for the fact fans drop dead when I mention this?

(It would work better if it was Rainbow Dash.)