Project Hail Mary has taken theaters by storm and fans are already hungry for more adventures with Ryland Grace and Rocky. The good news? Author Andy Weir isn't ruling out a sequel, even if he's not actively writing one just yet.
In an interview with Den of Geek, Weir was asked directly whether Ryland Grace ever makes it back to Earth. His answer was... strategic. "I didn't define that," he responded. "I might write a sequel someday and I might want to talk about those things. Right now, I don't define things that are outside the pages."
Weir is essentially keeping the door cracked open for future stories. At first glance, it might sound like there are already secret pages in Weir's office featuring more Grace and Rocky adventures. But the author was quick to clarify that's not the case.
"I am not working on a sequel right now," Weir confirmed. "The book I'm working on right now is a new standalone story that's not a sequel to anything else. I have absolutely thought about sequel ideas for Project Hail Mary, but I don't feel like I've got something that's good enough to run with yet. But I've got some bits and pieces. Some ideas."
So Weir has considered it, he's got some concepts floating around but nothing concrete enough to commit to yet. For fans hoping for more adventures, that's actually pretty encouraging news.
Book vs movie ending
It's worth noting that the film adaptation leaves things a bit more open-ended than the book. In both versions, Grace ends up on Erid after sacrificing his chance to return to Earth in order to save Rocky. The Eridians build him a beautiful biodome to live in, complete with a simulated beach and Grace begins teaching Eridian children while maintaining his friendship with Rocky.
But here's the key difference. In Weir's novel, the epilogue takes place 16 years after Grace arrives on Erid. He's around 53 years old, needs a cane to walk and has clearly settled into a long life on the alien planet. The decision to stay feels permanent given he's aged and going back to Earth isn't really viable though the option is there.
The movie, however, presents a slightly different timeline. Grace has seemingly just arrived on Erid and he's still relatively young and healthy. Rocky even tells him that the Hail Mary has been repaired and is ready to take him back to Earth whenever he decides. As directors Phil Lord and Christopher Miller explained to /Film, "The thought process there is that it's more powerful if it's a choice."
This more ambiguous ending means Grace could still choose to return to Earth later or stay on Erid. The possibilities remain open. And that openness might even create fertile ground for a potential sequel.
What Weir is working on instead (another sci-fi!)
When it comes to his current project, Weir is keeping his cards close to his chest. He is notoriously tight-lipped about works in progress, and for good reason.
"I don't talk about those until they're published because I might change my mind and ditch major things," Weir explained. "So I don't want to commit to things. I will tell you that it's science fiction, and it's a new standalone novel. It's not a sequel to anything."
It's sci-fi, it's standalone and it's not connected to The Martian, Artemis or Project Hail Mary.
Interestingly, Weir has stated he considered writing a sequel to Artemis, but ultimately decided against it due to the book's lukewarm reception.
So, will we get a Project Hail Mary sequel? Maybe. Maybe not. Weir has ideas but nothing concrete yet. If a sequel happens, it'll be because Weir found a story worth telling that adds something meaningful to Grace and Rocky's universe. And if it doesn't happen, we still have the complete satisfying story that already exists, plus whatever new adventure Weir is currently cooking up.