I will likely not go to see this at the theater, but I do have some personal connection to the Manhattan Project.
My grandfather worked for Stone & Webster and was one of the lead project engineers for the Y-12 facility at Oak Ridge, which was also constructed by Stone & Webster. He was one of the people sitting at the table when they couldn't get enough copper to build it, and the decisions was to approach the US Treasury to get silver to continue the work...resulting in 15,000 tons of silver being given to Stone & Webster to finish production of Y-12.
Once Y-12 was built, he was moved to another government project where he was part of the team that designed the exploding-bridgewire detonator, the core that compresses the fissionable material and causes it to fission, working under Lawrence Johnston, who recruited him personally in Boston. My grandfather helped design the wiring harness that insured that the electrical charge would be delivered equally and at precisely identical voltage and heat at all points outside of the casing. That was more difficult than anyone had predicted, apparently...imperfect wire created minute variations in delivering the charge, and heat, and this would cause the detonator to fail.
What they ended up doing, was buying a higher gauge wire than was called for, and re-rolling it themselves like spaghetti to get the precision they needed.
My grandfather claimed he never knew what it all was for until he read it in Life magazine. I'm pretty sure he was lying, probably a lifetime NDA. He was a mechanical engineer, not a nuclear engineer, but I find it hard to believe he didn't pick up on what it all was for, especially since after the war he went into building nuclear power plants for Stone & Webster. He didn't design them, of course, but he was project manager on countless nuclear plants, first in the United States, but then after 3 Mile Island, the majority of his work was abroad.