They're basing the movie on the original 8-episode OVA series, not the later additions. I remember checking the originals out from my library when I was a wee lass of 13. Mmmm, delicious nostalgia.
It looks like the project has actually been tentatively in the works since late 2008, when AIC first optioned the rights and teamed up with Singapore's Cubix. The other companies that have since been added on to the project are Axxis from Singapore, Arclight from Australia, Wizzfilms from Canada, Infotainment from China, and Latec International from the UK. (I believe that Axxis is a part of Cubix, or possibly vice-versa.)
Since four of the companies involved are from English-speaking countries, I'm willing to bet they'll be working it as an English-language movie. So let's start dream-casting, shall we? Here's a quick run-down of the main characters, the Knight Sabers. Tell me who you'd cast from Hollywood or abroad to play 'em!
Sylia Stingray – The leader, daughter of the man who created the mech suits the girls fly. A brilliant scientist and wealthy businesswoman who finances the team.
Priss Asagiri – A rock'n'roll singer by day, a mech suit pilot by night. And she rides a motorcycle too. An orphan and former gang member, she has a bad temper and a would-be boyfriend who's a cop.
Nene Romanova – Petite, cute, sweet, with a sweet tooth. She isn't super-useful in combat, but she's the techie of the group and a hacker, as well as a member of the AD Police, acting as a mole for the Knight Sabers.
Linna Yamazaki – A yuppie. Along with Nene, Linna was mostly comic relief, although she occasionally showed a more sensitive side than the superficial serial dating persona she usually puts on. Like Priss, she's an orphan.
Okay. Get casting!