>>9880884War.
War never changes.
They need to incorporate modern conflict to respark kids interest in military toys. Like drones and borderline sci-fi. Working laser rifles, or sonic weaponry.
Or make it more realistic? Give them actual facial hair again? Show the atrocities and fallout of war? Have a MASH unit, or nuclear/chemical warfare, or "advanced interrogation" techniques?
It needs a refresh, not upscaled nostalgia.