"We are doing it as a musical on Broadway! I say we, because I hope Greg will be involved, he's my best friend so I want him to be involved," Wiseau said. "But we're going to put a musical on Broadway."
"I did some research already and, as you probably know, it costs a lot of money," Wiseau added. "But the good news is, it's workable. I would stay say maybe two years from today. We have one person who's very powerful who got in touch but I will not drop the name. But I think it's very workable.
Sestero has already had a singer-songwriter reach out to him to express interest in working with him on a musical adaptation of the 2003 movie that is so bad it's amazing.
"You know Ben Folds? He read 'The Disaster Artist' and wrote to me saying that he was inspired by the story and wanted to turn it into a musical," he said. "But again, it's really tough. Musicals are the toughest thing to get off the ground."
More immediately, expect a new movie from the pals. "We're working on a horror movie," Wiseau said. "But we'll be working on a trailer soon."
"It will be directed by me. Next summer I want to do it," he added. If this project comes into fruition, it will be his second feature film as a director. He previously directed four episodes of his Hulu series "The Neighbors."
When asked about the highlights of their Hollywood awards season run last year for "The Disaster Artist," which was nominated for two Golden Globes and an Oscar, Sestero said it was meeting the A-list celebrity fans of their work, including "Get Out" star Daniel Kaluuya, Tom Hanks and -- believe it or not -- Angelina Jolie.
"Either she had seen it or her kids had seen it," Sestero explained. "The whole thing was interesting to a lot of people."
And here's something "The Room" aficionados will find very interesting: Wiseau finally revealed how he made his fortune that allowed him to independently finance his multi-million dollar film (James Franco said it cost $6 million), and market it with an expensive billboard sitting pretty on Sunset Blvd. in West Hollywood for five years, which has been estimated to cost $300,000.
"I used to build buildings, that's where the money came from [for 'The Room']. Sometimes people are teasing me about where the money came from," he said. "But yeah, I'm very proud of it."
Take that claim with a grain of salt, though. Wiseau is notoriously tight-lipped about his wealth and country of origin. In 2008, he told Entertainment Weekly that he made his fortune importing jackets.
"We import from Korea the leather jackets that we design here in America," he said. "If you work, you have to save money, right? I didn't get money from the sky. I was preparing, let's put it this way."
These days, he's also got his own line of underwear, in case you want to get a gift for that special man in your life, or just want to treat yourself. "I design underwear, thank you for asking. But I've been in the fashion industry from way before," he said.