Part of Empire's new issue is a big feature and interview with Cameron.
https://www.empireonline.com/movies/news/james-cameron-tom-cruise-almost-shot-film-space-together/
On The Abyss and True Lies blus:
https://www.empireonline.com/movies/news/james-cameron-tom-cruise-almost-shot-film-space-together/
"I actually talked to [Cruise] about doing a space film in space, about 15 years ago," Cameron told Empire. "I had a contract with the Russians in 2000 to go to the International Space Station and shoot a high-end 3D documentary there. And I thought, 'Shit, man, we should just make a feature.' I said, 'Tom, you and I, we'll get two seats on the Soyuz, but somebody's gotta train us as engineers.' Tom said, 'No problem, I'll train as an engineer.' We had some ideas for the story, but it was still conceptual."
On The Abyss and True Lies blus:
"Man, it's on my to-do list," Cameron admitted. "It's a question of time-management. True Lies and The Abyss both have Blu-ray transfers that are complete for my review. The problem is the next 14 hours when I have to go back and trim the color and get each one perfect. That's 28 hours. I don't have 28 hours." He added that he's hoping to take a look at them before 2019 arrives: "I've put it on my list to try to get it done before the end of the year."