Stitch

This will probably be laughed at by the defense professionals on the forum, but I play a flight sim which offers an "EB-52 Megafortress" as one of it's flight models. If you want to talk about an aerial "battleship", I can think of no better candidate than a heavily-modified B-52H; between it's payload, range, and room for add-ons/upgrades, no other airframe has as much room for expansion/modification as a B-52H. Give it a couple of CSRL's, one CSRL loaded with AIM-54C's, the other loaded with AIM-120D's, AIM-9X's on the wing pylons, a new multi-mode AN/APG-77 AESA radar in the nose, and you've got a major stand-off anti-aircraft platform.