To be perfectly honest: The only character that they would potentially do that they weren´t allowed to before, is Karg. And Skeletors Troopers.
Lubic, Julie, Kevin... Those don´t really make for impressive looking MOTUC actionfigures. They would need to be almost 100% new tools, given their slimmer bodies and their clothes. Maybe Kevin could share parts with Teenage Adam, and Julie might borrow some tools from a few previous female figures (Sorceress arms, for example). But the majority of parts would have to be new tools. And that´s very expensive and only adds to the already expensive rights to the movie. So I don´t really see this happening.
But HELL YES, I´d wish for it!