The only reference to inter-movie Dooku encounters is Anakin telling him his powers have doubled since last they met. Doesn't necessarily mean it was AOTC.
As for Grevious, it is clear that only Anakin has never met him before from the dialogue. He speaks as if he knows Obi-Wan. And Anakin never fought Grevious in the cartoon.
At some point in a future episode the Seperatist leaders would have been broken out of jail by their cohorts.