O Starwars.com tem esta sinopse
When Anakin is forced to temporarily turn over command of his clone troopers to a new commander, the Jedi Pong Krell, tensions begin to run high as the clones are assigned with a very deadly mission to take the capital of Umbara.
O IMDB tem esta sinopse
During an assault on the shadowy world of Umbara, General Skywalker is called back to Coruscant. He has to relinquish command of the 501st legion to legendary Jedi Master Krell, who turns out to have a low opinion of Clones.
Ambos indicam que isso é algo que Anakin tem que fazer. Se fosse um artifício, eu esperaria que fosse um ponto de enredo (ou seja, quando Anakin é levado a abandonar o comando ...)