By now it's pretty well known that there is minimal crossover between the Marvel cinematic universe and its younger TV siblings such as Agents of S.H.I.E.L.D. on ABC and Daredevil on Netflix. With a few throwaway references here and there, such as mentions of post-Avengers devastation in Daredevil and character crossovers like Lady Sif appearing in Agents of S.H.I.E.L.D., the plots of the movies occasionally affect the TV shows, but so far it's been a one-way street.

For some, Marvel's movies and TV shows are best kept separate, but for others the separation represents a missed opportunity. For instance, in Marvel comics Kingpin has long been an adversary of Spider-Man as well as Daredevil. That has led to some speculation that Vincent D'Onofrio's Kingpin might make an appearance in Spider-Man's next solo movie, Spider-Man: Homecoming. With Michael Keaton cast as Homecoming's villain, that possibility now seems pretty dim. In case there was any doubt, though, D'Onofrio himself has weighed in.

Taking to Twitter, D'Onofrio addressed the rumors directly, and said that if any such crossover was in the works, he hasn't heard about it. His tweet then linked to one such rumor from Uni MEDIA, LLC for reference:

That's not to say that D'Onofrio isn't interested in any such crossover. In fact, in a follow-up tweet he exclaimed, "I love all this action about me doing #SpiderMan Tell Marvel!!!" His enthusiasm for a possible appearance in Homecoming echoes similar sentiments from one of D'Onofrio's Daredevil co-stars when Charlie Cox said he would love to show up in an Avengers movie.

With at least some of the actors willing and excited to make possible appearances in the MCU movies and no doubt many fans at least equally as excited, it is on Marvel to make it happen. With the movie and TV factions within Marvel not quite aligning, there are some roadblocks to crossing over their TV and movie franchises, but it is certainly not outside the realm of possibility. Kingpin appearing in a future Spider-Man movie would be a smart move, with other villains like Green Goblin having been a little played out by this point. Besides that, D'Onofrio has more than enough movie experience under his belt to prove his viability as a big-screen draw, including his role in the upcoming remake of The Magnificent Seven.

In some ways it is easier to keep the movies and TV shows separated to avoid having to worry too much about continuity between the two. Keeping track of the continuity in one or the other is difficult enough, but if they were too closely intertwined then a monumental amount of effort would be needed to keep all the various plot points straight. If Kingpin were to get a get-out-of-jail card to appear in Spider-Man: Homecoming, then Daredevil's showrunners would be left trying to figure out how and when to work that into their show. If they were able to pull it off, though, it would be a win for Marvel fans.

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Captain America: Civil War is in theaters now. Doctor Strange opens November 4, 2016; Guardians of the Galaxy Vol. 2 – May 5, 2017; Spider-Man: Homecoming – July 7, 2017; Thor: Ragnarok – November 3, 2017; Black Panther – February 16, 2018; Avengers: Infinity War Part 1 – May 4, 2018; Ant-Man and the Wasp – July 6, 2018; Captain Marvel – March 8, 2019; Avengers: Infinity War Part 2 – May 3, 2019; and as-yet untitled Marvel movies on July 12, 2019, and on May 1, July 10, and November 6 in 2020.

Source: Vincent D'Onofrio