PT Sith versus PT Jedi
Sidious' plan had worked... Young Skywalker was now following the dark path of the Sith, with the soon-to-be-emperor as his master. Dooku, in a moment of inspiration, had stunned young Skywalker in the fight on the Invisible Hand. With the ship itself nearly destroyed in the space battle, Palpatine, Dooku, and Grievous had stole away with the unconscious Skywalker, leaving Obi-Wan to escape by the skin of his teeth. Reacting to the sudden tremor in the Force, as Senator Amidala was murdered along with several others in the surprise attack by General Grievous. The droid army commander himself died in the Battle of Utapau, and the two Sith and their new acolyte escaped to the deserts of Korriban, where they erected a secret base within the ruins of a Sith academy.
However, Jocasta Nu was instrumental in the tracking of the Sith, and masters Yoda, Windu, and Kenobi arrived on Korriban to confront the new threat...
Combatants:
-Sidious is the same as he is depicted in ROTS. His priority target is Yoda, though he will not miss an opportunity to slay a lesser opponent should it arise. Since the confrontation is in the center room of the academy, there is debris for the Sith to utilize, and perhaps a pillar if he's lucky, but there is no place for him to hide. Sidious, not much of a team player, will nonetheless protect Anakin if and when he can due to Anakin being the product of Plagues and Sidious' midi-chlorian manipulation and thus, the legacy of the Sith.
-Dooku is the same as depicted in ROTS, only more dedicated to the fight, not merely playing with the opponent as he was in-movie. His priority opponent would be Mace Windu, since the two have a bit of a grudge. Dooku is not against challenging Yoda should the opportunity arise, but he is loathe to truly fight the wizened old master, and is secretly insecure of his powers against Yoda.
-Anakin is no different then we see him in ROTS. He does not possess any additional Sith skills, since he has not had the time to study true Sith lore. He believes that Obi-Wan abandoned him and left Padme to die, thus making his former master his priority target. However, Anakin will protect Sidious since the sith lord has promised to clone Padme in exchange for the elimination of a 'corrupt Jedi Order and restoration of balance in the galaxy'. Anakin has no love for Dooku and will not neccessarily go out of his way to help the older former jedi.
-Yoda is as we see in ROTS. His priority is the dangerous Sidious, although he is resolved that young Skywalker be redeemed and, if possible, Dooku. Thus he will engage either of those two if needed, but will try not to land a killing blow. Yoda will defend Obi-Wan and Mace equally if needed.
-Mace Windu is as we see in ROTS, and his priority opponent will be Count Dooku. While Mace is not opposed to laying the smack down on Sidious or Anakin (And with Dooku and Sidious he is willing to kill) his priority target will remain Dooku unless Yoda has complications. Mace Windu will help his comrades, though he leans towards helping Obi-Wan more due to the younger master's age.
-Obi-Wan is the ROTS ninja we all know and love. His priority target is Anakin, since he knows he cannot singularly take Sidious or Dooku. Obi-Wan will fight Dooku and Sidious to the death, particularly if another falls, but he still has some hope for redeeming Anakin. Thus, he will hold back to a certain extent, trying not to kill the Jedi but talk him back to the light. However, if it becomes apparent that such measures will not work, he has been told by both Windu and Yoda to end Skywalker's life... The redemption of one is not worth the cost of the Sith destroying the Order.