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that's the end of the story.
You could try the Rebuild movies, which are a rebooted series of movie, but Asuka's role is pretty minor there compared to the original. Also has a name change to Shinikami (the best analysis on that I've found suggests that it is to make her seem more mass produced, as an ironic glance at how the franchise has progressed into cashing in). And some shameless new costumes entirely to make new merch.