Stan Lee is often quoted (apocryphal or not) as saying that every comic is somebody's first one. But as Marvel Studios prepares its 13th big screen adventure, the same logic won't apply to "Captain America: Civil War."

As part of a new interview with The Wrap, "Civil War" screenwriters Stephen McFeely and Christopher Markus admitted that there was no way for them to make the franchise film that some have referred to as "Avengers 2.5" totally inviting for brand new viewers.

"We had to make a decision early that we were OK losing virgin audience members," McFeely said, stressing that such an idea wasn't the end of the world. "If you don't know some of these movies before you walk in you might be lost, but hopefully you'll still be entertained. We can't do a 'previously in the Marvel Cinematic Universe,' because it will take 25 minutes."

At least the writers have good tabs on things, having already written both the first two "Captain America" movies and serving as creators and executive producers for two seasons of the "Agent Carter" spinoff TV series.

"This isn't a new thing, it's an ongoing story that's organically evolving movie to movie," Markus added. "In the beginning I think [Marvel] did operate as, 'If this is your first one, it should be as fun as if it were your third one.' Its a dense ongoing novel at this point."

"Captain America: Civil War" opens this weekend.