13:18 - Anakin (to Yoda): "We intercepted a transmission calling Dooku to Coruscant." This line contains the same words that are used in Vader's interrogation of Captain Antilles in A New Hope [5:44]. Vader asks, "Where are those transmissions you intercepted? What have you done with those plans?" to which Antilles replies, "We intercepted no transmissions."
15:10 - Anakin's encounter with Dooku ends the same way as that in Revenge of the Sith, although the framing doesn't quite match:
19:30 - Force priestess: "There is another Skywalker." In Return of the Jedi, Yoda says this to Luke [44:25].
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At 20:54, there's a musical cue of Yoda's theme.