I was thinking about Zod's troops as well...they could have very well been Nam-Ek and Aeythr, he addressed them as Cadets. The woman from the future's name is actually credited as Alia according to Smallville Wiki which normally gets their info from Kryptonsite. Remember that Davis first emerged as Doomsday at the end of Bride which was around mid-season so if Metallo does appear next week, he could potentially be around for a while. Not sure what kind of contract BAG signed in the summer.
The dream sequence is interesting, it shows as far as I was able to see: a man dressed as Zod, Tess kneeling down before a shadowy figure (could be real Zod or someone else), Chloe lying on the ground apprently unconscience, Ollie searching for something on the ground, Lois and Clark having sex and a weird expression on Clark's face (methinks that Red K is afoot folks maybe), and a woman possibily Alia coming at Lois with a sword. Fascinating. We haven't had a mystery on Smallville in ages if ever.