On another front, "strange circumstances" return Lana home, and her new beau follows, apparently becoming Smallville High's latest assistant football coach, while he and Lana keep their relationship secret (because he's employed by the school?). Lana goes to say hello to Clark, and apparently catches him in a smooch/embrace with Lois!
In a later episode, Lois, Lana, AND Chloe all get possessed by "Witches" from the 1600s who MAY have been ancestors, and also Kryptonians! Also, both Sam Jones III and "Whitney" (Lois' old boyfriend) return for guest appearances, either in flashbacks, or for a visit.
Also, both a "new threat" (probably magic), and a "new power" make their debut, this season... It is almost certainly NOT Flight, however! (Tele-/Micro-scopic Vision?)
So, we KNOW that Chloe is still alive. No word on Morgan Edge! We also know that there will be an episode entitled "Transference", in which Lionel Luthor, aided by an emprisoned Mathematician who helps him figure out 17% of the Kryptonian Language, trades bodies with... (wait for it!)... no, not Lex, but... CLARK KENT! Kent, in jail, learns about the transference, while Lionel, now in Clark's body, helps Jonathan by lifting a combine!... Thus, both learn quite a bit more about the other (but how much?)!