Like how Spider-Man actually belongs to Sony, not Marvel, and it gets loaned back to Marvel? Or more like how Blade isn't part of the MCU, but totally belongs to Marvel?
Sony has to release a Spider-Man movie every N months, or they lose the license, and will probably never get it again, since Marvel started making their own films and now they're part of Disney. This is why Sony keeps making reboot trilogies. Better to shovel something out than to lose the license forever. It does make a nice backstory for the Spider-Verse though.
But I think the analogy may be being stretched
Nothing is safe! Just wait til we get Star-Lord (Guardians of the Galaxy) accidentally facing off against some Jedi just so a writer can make some "Hans shot first" "inside" joke in some "way overshot the time travel to long ago in a galaxy far far away" plot...basically a movie to set up the joke in a trailer.