“Now make a movie out of Ringworld by Larry Nivens from 1970!”
Agreed.
“When Worlds Collide and the sequel After Worlds Collide by Philip Wylie and Edwin Balmer from 1933 & 1934.”
Saw the movie version of When Worlds Collide several times. George Pal wanted to make a film version of the sequel, but his career was slowing down at that point unfortunately. I read the book version of WWC. Not bad.
Elysium already had a ringworld like construct in it, only on a smaller scale.