(Sorry for the double post and all)
Regarding how this idea would tie into the two current existing role plays... it might... but that would heavily depend on how involved your character was in it. Otherwise it may as well be Season Two of The Rebellion.
However, The Rebellion ain't my turf and is entirely left to the writing cast of that role play. The point of my typing now is to discuss how this idea would tie into The University Unitious.
Would it weave naturally into the story? No. Could we squish it in there anyway? Of course we could; it's just a matter of how.
So I'm assuming this would happen after our Lucky's castle storm fiasco. Where exactly the battered student fighters would play into the story is fuzzy... Roguecog asked you to help him infiltrate Lucky's castle... would this be a scene where you disappear into the night leaving questions of your absence that not even Eerie can answer that would provoke some of us to go looking for you? Or would you haul the remains of your army to help out with the infiltration? Details, details....
Or you could have both, in which case you would enlist specific characters with useful abilities to go with you (like anyone who's proven themselves particularly hearty in battle, or Silence, since she was a thief and infiltrated places all the time). It would probably be in the best interest of the story not to recruit Eerie, so she can wonder at your absence and me, her, and other people can do the detective work to try to figure out where you are and what you're doing.
However! Perhaps you have other plans. Thoughts?
Also:
If The Rebellion or your other roleplay cooking in the oven gets reviewed, then yes, we shall hopefully see you again. Just don't go on vacation or anything. 
