6. Andorians
The Andorians are one of the original aliens in Star Trek, one of the four founding members of the United Federation of Planets. Though there never really received any prominence until the prequel series
Star Trek: Enterprise came onto our screens. In fact they didn't get any spotlight in the Next Generation era so Star Trek 3 would be a good chance for them to remerge better than ever. Coming from the ice moon of Andoria, the blue skinned aliens were a tempestuous people who came into a lot of conflict with the Vulcans series
Star Trek: Enterprise but became friends and allies of the Federation as the show continued. I would like to see their potential explored further. With the uncertainty over the upcoming Klingon conflict and the decimation of Vulcan, the Andorians could prove to be a powerful ally. And as they never established their lifespan, how about getting Jeffrey Combs back as Sharan from Captain Archers series? Sharan was one of the most entertaining characters in Star Trek: Enterprise and would be a great supporting character in any future films. Plus Jeffrey Combs is an iconic actor in the franchise (he played the brilliant Weyoun in Star Trek: Deep Space Nine). Surely he deserves his shot at the big screen?