Hoping we at least see some of the advances from the Vengeance incorporated into the refit Enterprise and used in the new film.
I wouldn't mind seeing a "real" Vengeance - not one that's used for what Admiral Marcus intended it for, of course, but an actual production line version of the class. Because you know there's blueprints still sitting around in Starfleet's mainframes, and they could build new ones whenever they wanted.
As repugnant as Marcus' intentions were, it would be silly to just discard that super-advanced class on a whim. Think of what that kind of technology could do for Starfleet's REAL mission.
Who knows? Marcus may have had more under construction in other parts of the Federation. One doesn't seem like it would be enough to fight a war.