The Season 1 Pass for Skullgirls 2nd Encore has been announced.
According to the Skullgirls 2nd Encore Season 1 Pass FAQ, the plan right now is to have Annie available for early access in March 2021.
"Depending on how well the Annie DLC and Season Pass does - we hope to add even more FREE stuff to the Season Pass list, up to and including a FIFTH Brand New Character!