1. Sunstreaker, because he has been left out so many times when his brother has been there.
2. Sideswipe, just because Sunny is there, too.
3. Jetfire (more like he was in UT), we need to see epic aerial fight between him and Starscream.
4. Wing Saber, because he's awesome.
5. Hot Rod or Hot Shot, even tough I see them as a different character, it would be too confusing to have them both.
6. Prowl, he already has a design, and was left out from the movies. Basically, I wanna see him on screen.
7. Elita One, because femmes rock, and we need more of them.
8. Blurr, do I need to explain?
9.-10. Ultra Magnus + Wreckers, because... I can't come up with any explanation, I just wanna see them.