Did you ever get this answered? If not, just look at Deadpool #3 in 1993. It's not labeled as Deadpool -The Circle Chase.
Vanessa (Copycat) is in 3 full pages of Deadpool CC 2 in her true form - with even a reference to XF 15 (as Domino), AND a conversation with her mother. Clearly qualifies as a "full" appearance, even if you consider X-Force 19 a cameo (which I don't). Naked in bed rulz as far as I'm concerned.
1st Copycat name is on Circle Chase 3 - First Copycat appearance?
She does appear as Vanessa Carlysle in X-Force 19-24 & Circle Chase #2
Its all pretty irrelevant at this point since we dont know if she will even be in the movie, but the casting role description seems pretty convincing
I still think she's going to play Domino but that is just me I guess.