Could the battlecruiser concept ever return?
Short answerIt could return where a long-range independent cruiser needs capital-grade weapons; that is different from simply calling a fast battleship a battlecruiser.
NotesThe proposed definition follows the HMS Tiger example: a ship intended for long-range cruising that carries capital-ship-grade weapons. A capital ship designed mainly for speed belongs closer to the fast-battleship category. The Kirovs provide an existing reason for the battlecruiser label to persist, while Stargate's Daedalus class supplies a fictional comparison. Space operations could give the combination of independent cruising and heavy armament a renewed purpose.