Cyro will be bringing some old 2nd, 3rd and 4th edition Space Wolves to the table as well as filling out the army with a few new models. He might also have some Chaos if I remember correctly.
Black Iniquity will bring the artillery with some Imperial Guard forces. This will mostly be new, but might include some classics as well.
And finally Invictus Legion will probably bum an army off me and play with that, at least for now. I wouldn't slip the chance to buy a new Tau force passed him however.