A knight from Arthur’s Round Table travels foward in time and possesses Dane “Black Knight” Whitman. His mission is to find the Excalibur team who are destined to save Camelot from dragons-that-are-really-aliens.
If this interests you, great. Go read this. If it doesn’t then…Don’t.
I myself skimmed it. I noted that it does establish a long line of Black Knights, with Dane Whitman just being the latest, and the one in this one is supposedly from the old 1950s Black Knight series. We kinda knew there had been more than one, but there’s actually been eight. Whatever. This doesn’t make me like Black Knight.