The rugged hero is a time traveler who famously originates from a horrific version of the future, and one has to wonder if it’s possible X-23 could be from the same timeline — possibly even being Cable’s ward following the death of Wolverine.
The key to this cameo could potentially be tied up in the introduction of Josh Brolin’s Cable to the X-Men universe.
To take the idea even further, it’s possible that she is the reason that Cable has a teddy bear strapped to his belt, serving as a memento of what he’s fighting for.