LOL. This just proves Spider-Man can't be handled on the big screen.
Dude, I get that you're on another tier of fan than I am with these things. And you're completely entitled to your own opinion, absolutely. And I haven't been a Pollyanna about everything that's been linked here (Suicide Squad, earlier Spider-Man rumors about Asa Butterfield, Supergirl, etc.). But you are so
unrelentingly negative about every bit of news related to this Spider-Man stuff that it's becoming a bit of a drag, at least for me personally.
I just... I dunno. I don't want to pick at you, and like I said your opinion is your own.
... But I dunno. Try to let hope spring eternal, or something?
Anyways. I've never seen Castle, but being as it's a completely unrelated 'verse to the MCU that plays in a completely contrary reality, I can't imagine that "crossover" idea going down. Maybe an homage in some subtle way. I don't watch Castle but he's a writer or something, right? Maybe Coulson picks up a book he's written on that show or something like that.
Although I guess since AoS is set on "Earth," it's more possible for there to be a version of Castle that exists on that 'verse than it is for there to be an episode of Castle where they all of a sudden start talking about the superhuman wars that have been ravaging the planet for the better part of a decade now.