Ardee01
Hmm... the best case for Tenzin would be that he's gonna be used a hostage so Korra would surrender herself to the Red Lotus, and the worst has him getting killed off. Knowing how rash and emotional Korra is, she's most likely to come charging at the Red Lotus out of pure wrath in the second scenario and will most likely get captured there.
So yeah, we currently have a Schrodinger's Tenzin right now and I dunno how I feel about that. cat_crying
I don't think Korra would get captured. I think she would go into the Avatar State and whoop their asses, much like Aang almost did to the Earth Kingdom soldiers in the "The Avatar State" episode. Aang went into Avatar-mode because Katara was in danger, and I bet Korra would do the same thing if Tenzin was seriously hurt/killed.
...that said, I hope they don't kill Tenzin.