In 2018, Jason Momoa will surf into "Aquaman," based on the sea-dwelling superhero of the same name. We'll see Momoa as Aquaman even earlier than the planned solo film, in fact, thanks to 2017's "Justice League," and quite possibly even earlier with "Batman v Superman: Dawn of Justice" in 2016. Not to mention approximately seven million other DC Comics movies.

That's a whole lot of Aquaman. So if you're a Momoa fan (and why wouldn't you be?), it's great news — albeit with one downside for "Game of Thrones" fans.

When we spoke with "Thrones" mastermind George R.R. Martin this week at the 92Y in New York this week, where he was promoting his new book "The World of Ice and Fire," we asked Martin, a lifelong comic book enthusiast, for his take on Momoa as Aquaman.

"It's pretty extraordinary," he said with a big smile. "Jason Momoa is fantastic. He was wonderful as Khal Drogo. I wish we could've kept him for another ten seasons."

Martin went on to say that he and Momoa used to talk about collaborating on some sort of "Adventures of Young Khal Drogo" series, which would chronicle the legendary warrior's early years prior to the events of "Game of Thrones." However…

"I guess I won't be able to do that now," Martin said, "because he's tied up being Aquaman!"

Martin's probably joking; at the very least, the likelihood of actually seeing a "Khal Drogo" spinoff anytime soon feels unlikely, not while "Game of Thrones" still needs to finish up. But once that's done, perhaps Momoa's Aquaman commitments will have loosened up a bit, leading the way to some form of Khal Drogo reprisal after all.

(We can hope.)

The only other big bummer about Momoa's new superhero role, according to Martin, is what it means for the legacy of the original "Aquaman" movie:

"I guess Vinny Chase's 'Aquaman' is forgotten about," he laughed. "This is the reboot!"