Yesh, I think Ventress will be back in the next project, but without connection to her appearance here. It was just a little teaser for her return, nothing more.

I have to agree with the feedback someone gave here for Movie 2: The Phee scenes where 2 missions get teased, but do not come to fruition, feel a bit off.

I don’t exactly know how to resolve it. Maybe it is enough if the second scene shows them hanging out in the bar, listening to Phees stories to show that they are not busy currently?
So the Dooku mission gets brought up to show she has ideas too crazy even for the Batch, the second one makes us question her truthfulness and sanity? Would need a dialogue change when the Batch is called by Rex, but maybe thats doable?