I say Brakedown/Breakdown
, since Hasbro owns the trademark on that name and the younger audience will remember his character from TF: Cybertron.
Vector Prime would just confuse the average movie go-er since it's another Prime.
Kup's name is probably no longer reserved for Hasbro, unless they pull out the 'ol "Autobot Kup" trick again.
Alpha Trion is probably too complex a character to do in this movie series, someone like him has alot of backstory, which the films seem to lack.
I'd dig Brakedown in the movie series, you could do something really cool with his design in the movie style, if you wanted to do a similar looking robot...