Levistus's_Leviathan
5e Freelancer
Nah, IMHO, you should combine the "pact with yourself" Warlock with a Time-Dunamancer Warlock , and you get the "Future Self" Warlock patron, where a future version of you turned the present version of you into a warlock of them in order to ensure that you survive your adventuring career, and thus be strong enough to . . . become a warlock patron of your past self.In a not-so-serious vein, I was thinking about what other psionic subclasses they could create besides the Psychic Warrior and the Soulknife, and had the sudden thought they could do a psionic warlock, but the pact would be with yourself, in the ultimate self-motivating, "I can do this" sort of way...
They could even have subclass features called "Mobius Mage" or something like that!