In NS1 the Marines only had one commander. N2 will be adding an Alien commander, and even multiple commanders per team. Can you explain how having multiple commanders on the team will work?
Sure. Teams now need to create multiple Command Stations or Hives in special rooms around the map in order to make big advances in technology. Along with these advances, each new Command Station or Hive will house another team Commander. Commanders can affect the team through team resources but also have their own units and abilities that are all theirs.
More questions answered at SuperHappyFunTimeShow. Also check out the NS2 site, it's now updated with other concepts, renders, videos.