Thats what i meant, that you'll expand after the first release. I think it would be a good idea to give the 'rines special weapons depending on kills and or kill-to-death ratio (plasma guns are already balanced!). And assault and bikers are a bad idea in retrospect, because instead of team-based play you'll have like two bikers, three assault guys, one tactical rine, and two specialists running around, like in old RS. But there cannot be a nid invasion without some 'stealers...
You guys will eventually come out with more classes, right? Because i would love to see a Broodlord duking it out with a Commander, or a Hive Tyrant getting swamped by Terminators and Assault Squads. Or even Bikers gunning down some Genestealers.
ASSAULT CANNON Its has four shots, great strength, decent AP, and RENDING Even though its heavy, the only things that can have it are tanks and Terminators, so you can fire and move.