I mean, Weapon X (Plus) Program is supposed to be like numbered and X, Wolverine, being the tenth experiment, with Weapon I being Captain America, others being Deadpool (retconned) and Luke Cage.
Uh, hang on, are you sure about that?
I know Logan was Weapon X (as in Roman numeral 10), and that X-23 is a continuation of sorts based on that, but I didn't know Captain America was considered Weapon I. When was that retconned in?
Edit : Aha, just looked it up. Seems they added that little tidbit back in 2002.
...and wow, they shouldn't have bothered. This "Weapon Plus" crap is a fucking mess. They gave super powers like Wolverine's (including claws) to a fucking squirrel, and apparently somehow experimented with symbiotes like 2 decades before the first one arrived via Secret Wars. So much for quality control over at Marvel.