If they remake Revenge of the Sith, they would make it a definitive edition.
New Stuff:
Battle of Yerbana Level
The Siege of Mandlore level
Ahsoka vs. Maul Level
Kashyyk Level
Ahsoka and Rex hangar level
Yoda vs. Palpatine level
Matt Lanter voicing Anakin
Tim Curry/Sam Witwer doing Palpatine
ROTS Music now in the video game
Stuff that didn’t make it in the video game
Ahsoka and Maul as playable characters.
Differences:
Jocostas Nu survives
Cin Drallig has brown hair