IMDb has finally updated their page with a list of cast & crew for the upcoming BIO5. Three of the people on the cast list has a name to their characters so I assume that they will have some speaking parts in the movie...
EMMA LAHANA (as Lara)
Most Noted Appearances: As the Yellow Power Ranger in Power Ranger Dino Thunder
BRITTANY CARSON (as Whitney)
Most Noted Appearances: As Debbie in a movie called Death in Change
IVAN 'FLIPZ' VELEZ (as Cholo)
Most Noted Appearances: Err, as Geri Halliwell (yes, of the Spice Girls) ex-boyfriend?