Grimlock challenging Prime for leadership of the Autobots in front of the Ark.... Sunstreaker is there for emotional support. Would it work in the movie? Addition: I was thinking about how to introduce the character and I thought that maybe a good way to introduce him is to have him discovered in bot mode in a hidden cave where the Autobot ark lands (the discovery could happen near the end of 2 as a hint for a third movie). Throughout the next movie, he appears in bot mode just for the sake of not wanting to transform. He is defiant and unwilling to aid in the fight against the Decepticons because he feels Prime is inferior. In the movie, after being shamed by Prime, he learns his place in rank among the bots, and in an epic struggle for Primes life at the hands of Devastator, Grimmy runs in, transforms into his Trex mode for 10 mins of classic Devastator vs Grimlock glory with all the other Autobots and Decepticons battling / gawking on the sidelines. During the battle, Grimmy transforms back to bot mode and with his energy sword starts hacking up Devastators limbs. Then, after transforming back to animal mode, he stands perched above the wreckage and gives a huge battle cry sparking cheers from the rest of the Autobots who are losing their battle with the Decepticons, inspiring them to conquer their enemies. My heart would promptly stop after that moment and I'd die a complete and satisfied nerd.