I've been waiting for this longer than you know
Much earlier in Smallville, a couple seasons back, there was a character named Adam who was ressurected through blood tranfusions from clark. Granted, no one knew exactly where the blood had come from but still...we do. The doctor that perfected that procedure, "perfect" in the sense of still being highly experimental, was a Dr. Teng. This is significant in that the Superman comics, Bizarro was originally created by a Dr. Teng.
With the exception of the current Bizarro in the comics, they've all been created by a Dr. Teng.
I'd long thought that Adam was as close to a Bizarro as we were ever gonna get.
http://www.youtube.com/watch?v=tVSVyuQDvVg
Fortunately this is no longer the case. This vid is 3½ minutes, and some change, of the end of Season 6 and the intro of a very impressive Bizarro. I kinda doubt they'll go with the imperfected speech (cuz that am not so wrong) but one can hope. Just hope this Bizarro will be around for more than a single episode.
Unlikely but I can hope.
Guess we'll all find out tomorrow night at 8pm.