Elliott Gould

Wait a minute. Are you talking about Barbra Streisand and James Brolin? Elliott Gould and Barbra Streisand split up in ~ 1969. I believe they officially divorced a couple of years later by the early '70's. Streisand, according to her autobiography, Call me Barbra, recalls seeing James Brolin at a 1983 awards show (her for Yentl, him for Hotel), but they didn't formally meet. She met and started dating Brolin in the late '90's. I think they wed in 2000. So in 1977, she and Elliott were through and she had yet to even meet James Brolin. She was dating and living with John Peters at the time.

So, no, I don't think Elliott Gould regretted making this movie at all. Capricorn One was an excellent installment into the '70's paranoia genre, and Gould played his character admirably.