This is a very interesting fight. I think both teams have a fair chance at winning. 👆
I'm assuming the feats that Ant listed above don't apply here cause this is pre-SoR SWTOR Vitiate.
Vitiate is the most force fight oriented character here and therefor he is the most dangerous opponent for team 2 which is why Yoda would be the one to face him. I'm leaning Vitiate here.
Plagueis vs Caedus is one the closest fights there is. While Caedus has an advantage in melee, Plagueis has an advantage in the force so in this case, he has the upper hand though just like Yoda vs Vitiate, this is a great fight.
Kun imo is already on par with Vader even without his amulets and since he has his toys here, he should defeat Vader. While this is the least important matchup of this fight, its also the most decisive one because it would most likely end before the other 2 fights.
The moment this is 3on2, team 2 guarantees itself the victory.
A different matching could lead to different results though. Vader and Caedus could try to hold off Plagueis and Yoda while Vitiate kills Kun. Team 1 would also have better team work.
So like I said, it could go both ways.