From Halopedia, the Halo wiki
Okay cool, must have missed both.
Drat, I wish SamGal would have sourced that video. Thank you for sharing this with me.
Beowulf and Cortana are said to be included as characters that affect gameplay in upcoming expansions for Fleet Battles.
https://www.youtube.com/watch?v=XnqvhSVfq5s
There is also an image floating around the net that shows Jun as a little tile piece that can be used to board ships in upcoming expansions.