“They always say time changes things, but you actually have to change them yourself.” — Andy Warhol
Andy Warhol was never sued over his Marilyns, but he was sued over other works. You could say the door closed behind him. Today, if you wanted to create a series of Warhols as Warhol did with his Marilyns, you would risk being sued for copyright infringement and right of publicity.
Incidentally, the Andy Warhol Foundation controls the copyright to all of Andy Warhol’s artwork, regardless of who owns specific works of art. You may purchase a Warhol, but you may never truly possess it.