Johannus said:

If it could be suggested that Dooku tried to tempt Anakin away from the jedi, and that Anakin later killed him in the heat of the moment but that it wasn't his first choice, then this could be used to show Anakin is already straying from the jedi path so all Palpatine has to do is give him the final nudge.

Perhaps this deleted scene could be used, and with some clever editing and a voice-alike for Dooku, we could have a suggestion of Anakin joining his cause rather than the Naboo? Or maybe even using clips from him speaking to the Captured Obi-wan.... Anakin pauses maybe, and Padme ends up answering for him.

https://www.youtube.com/watch?v=OjNA_SEKKKE