He assumed, like a lot of entertainment people do, that he could waltz in, get his concept published and then pitch it as a movie/TV show.
"Won't the publisher pay for that?"
Not if you want to retain media rights.
"Oh. Well, how much will it cost?"
It varies wildly, but high quality art and production on a 100+ page graphic novel could run $30,000...probably more.
"WHAT?!"
Dude, you work in animation. You know what art is worth. You'd never make these flippant assumptions about an animated film.
I 100% support anyone and everyone making comics.
Just don't assume it's easy, cheap, or a quick road to movie/TV glory.
He seems less excited now.
Comics can be very DIY. They can be put together by individuals or small creative teams in ways that film and animation can't, but that doesn't make it easy.