Some ideas:
Episode I
Attack of the Droids
Return of the Sith
An Old Foe Returns
Blockcade Busters!
Episode II
Attack of the Droids
Revenge of the Droids
The Sinister Threat
Mysterious Days
The Mysterious Plot
Knights of the Republic
Episode III
Attack of the Droids
Revenge of the Clones
The Clone Wars
The Crushing Blow
The Darkening
The Edge of Disaster