God: T-REX WAIT HOW DID YOU KNOW THOSE 2000-YEAR-OLD ROCKS WERE CARVED BY YOU?
T-Rex: God, please!
T-Rex: I've long made it habit to assume ANY unknown historical figure is me!
T-Rex: It's a great assumption. Not only does it turn me into the most influential person in history, but it ensures that at some point before I die, I'll go back in time and set things up so things are exactly as I remember them now. If that means being an unknown figure throughout history thousands of times, so be it! It sounds rad to me!
Utahraptor: What if you never actually go back in time though?
T-Rex: No worries!
T-Rex: On my deathbed I'll say "Aw man, I always thought I'd go back in time and mess with history", and then hopefully I'll disappear in a flash of temporal light because, actually, I've just gone back in time to mess with history.
Utahraptor: ...I see. So if I said that nobody knows who the historical King Arthur was?
T-Rex: I'd say "that's me!" His exploits shall be going to have been being done by me!
Off panel: Future perfect continuous passive?
T-Rex: Ahem.
T-Rex: Future perfect continuous passive, BITCHES.