It must be said that because of Lord Revan’s luminous awesomeness every fight that involves Him is yet another instance when He demonstrates astonishing pwning powers. Lord Revan is the inevitable victor, always.
However, to Lord Revan’s amusement and our entertainment, let’s just pretend He is not an omnipotent being.
In this case the fight goes sth like this:
Sion vs Obi-Wan. Obi-Wan dismembers him even worse that he did to Anakin, and though Sion will not die (or will he?), Kenobi will incapacitate him. For good.
Caedus vs Yoda. Very close fight, but I see Yoda taking it.
Vader (which one? I assume OT Vader) vs Mace. Mace wins via Vaapad, but Vader will give him hell.
Revan vs Dooku.
Spoiler:
Revan wins, ta-da.
All-out for team 2.