I'm really looking forward to seeing Planetside grow as a long term MMO which will retain high populations on every server.
With regards to NPC's, I would like to see randomly spawning giant insects which emerge from beneath the planet surface. Like the giant beetles as seen in Starship Troopers. I believe this would fit really well into Auraxis. Perhaps even a cert to be available for individuals to Psi and temporariy control these beasts onto an opposing force!
Secondly I would really like to see a space based battlefront over the orbit of Auraxis. With troops invading space stations via docking Galaxy craft and various player sized ships providing cover around these stations. The faction holding these stations could hold vital satelite installations providing intel to ground force and also the capability to provide orbital strikes in certain areas.