There's no movie franchise more doggedly obsessed over than the Marvel Cinematic Universe, and considering the sheer vastness of the enterprise that shouldn't be remotely surprising.
If superhero movies were once an embarrassing paycheck assignment for A-list actors, the MCU has helped validate them as genuinely gainful employment for Hollywood's elite, and so just about everybody is eager to climb aboard the gravy train.
Given the many MCU movies and TV shows in the earliest stages of production at any moment in time, fans absolutely love to speculate on who could end up playing iconic comic book heroes on the big (and small) screen.
Often the speculation is silly or just wildly off the mark, but every so often fans and supposed industry "insiders" actually get things right.
These 10 MCU casting possibilities are certainly among the more chattered-about in recent times, and while nothing is ever guaranteed until we hear it from the mouth of Kevin Feige himself, it's incredibly easy to accept that these rumoured castings are indeed the real deal.
And if they aren't, those fully invested in these actors playing these superheroes are going to be quite unhappy indeed. But again, while nothing's set in stone, the odds are at least pretty good for these rumoured casting picks panning out...
10. Glen Powell - Cyclops
There's no denying that Glen Powell was an absolute show-stealer as Hangman in Top Gun: Maverick this past summer, and so it wasn't long before rumours started doing the rounds that Marvel had secretly cast him as Cyclops in their upcoming iteration of the X-Men.
While many fans expected Powell to be revealed in earnest by Marvel Studios at Comic-Con back in July, it never happened, yet that did nothing to quash the popular belief that he will indeed eventually be revealed as the MCU's version of Scott Summers.
For his part, Powell has played it coy, declaring absolute ignorance about his casting in interviews:
"Nobody has called me. I don’t even have contact info for Marvel, so I have no idea what people are talking about."
Given Marvel Studios' extreme level of secrecy regarding their projects, it certainly wouldn't be the first time that an actor lied about securing an MCU gig - Andrew Garfield, anyone? - so most still seem to believe that he has indeed nabbed the part.