Sentinel Prime

If it makes you feel better, I think the studio just renamed Alpha Trion at the last minute. In all ways, he much more closely matches the character from Dark of the Moon. My theory is that they realized G1 fans would bay for filmmaker blood if they saw act as he did in the movie when they were in too deep to rework much. They'd designed and rendered a model, finalized a script, shot the principle footage, and released a teaser with Alpha Trion's head coming to life. Adjusting his name in post-production was all they could afford to do.

Alpha Trion did become distant and arrogant in his later life. In some continuities he became manipulative, callous, or outright corrupt.