Poll
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Yoda fights against Sidious and wins, even though Mace won the fight in ROTS I don't think he could do so again. Sidious underestimated the master and that is why he lost not because he was weaker. Yoda however was in a bad position during his fight and in another location he would be able to defeat Sidious.
Mace fights against Dooku and eventually takes him, the last they fought was years ago and Dooku become more powerful since then but probably not as much as Mace did and Mace would eventually take him.
Ki adi loses from GG.
And Plo takes Ventress after that he will fight GG but probably lose, Mace and Yoda are still very busy with their fight. If he can hold on for a very long time Mace and or Yoda wil help him and take the guy out.
If not then the Sith have a very good chance because GG would kill Plo and then move on to help Dooku against Mace and then Dooku and Sidious against Yoda, it kinda depends on who wins first.