As two major publishers for comic books and studios for film and television projects, most fans would think DC and Marvel shows would never crossover. While that might be true, it isn’t stopping the actors of “Marvel’s Agents Of S.H.I.E.L.D.” and “Arrow” from dreaming.

In a Facebook Q&A, “Arrow” star Stephen Amell told fans he wanted his show to crossover with “Marvel’s Agents Of S.H.I.E.L.D.” “Just because … because why not?” Amell explained.

Amell's comments follow his show's recent crossover with “The Flash.” The episode did extremely well. The second half of the event was the most watched episode in “Arrow" history, with just under 5 million viewers.

It isn’t surprising that Clark Gregg, who plays lead Phil Coulson on "S.H.I.E.L.D.," was happy to hear Amell's idea. “I was really flattered to read that," Gregg told ComicBook.com Monday. "He’s a fantastic dude and that show is so great! Are you kidding me? I’d love to have a scene with him."

A recent “Marvel’s Agents Of S.H.I.E.L.D.” Season 2 shooting location put the show close enough to do a crossover with another DC superhero. “We shot a scene just recently that was around the corner from the original Batcave!” Gregg said. “I want to meet Alfred! I suspect that won’t happen. [Laughs] I have so many fantasies that involve so many crossovers, not only with the DC Universe, but a galaxy far far away!”

So will a "Marvel's Agents of S.H.I.E.L.D." and "Arrow" crossover actually happen? Gregg’s fantasies might seem unlikely, but DC has worked with Marvel on several occasions. DC’s Batman has met Marvel’s Daredevil, Captain America, the Punisher, among others. Superman has met Spider-Man. The Green Lantern met the Silver Surfer. The entire Justice League co-starred in several comics with all of the Avengers. However, all of these crossovers have been in comic book form. Is it time to for an onscreen crossover between Marvel and DC?

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“Marvel’s Agents Of S.H.I.E.L.D.” Season 2 airs Tuesdays at 9 p.m. EST on ABC while “Arrow” Season 3 airs Wednesdays at 8 p.m. EST on the CW.