In a statement to TMZ, Joan Lee said Marvel and Disney need to be "checked and balanced" as they seek total control of her father's creations.
"Whether it's Sony or someone else's, the continued evolution of Stan's characters and his legacy deserves multiple points of view," she said.
While legendary comic book writer Lee created the Spider-Man character for Marvel comics in the 1960s, Sony has owned the film rights to the character for about two decades.
Disney, which owns Marvel, and Sony had penned a deal in 2015 that would bring Spider-Man into the Marvel Cinematic Universe.
If talks do not resume, it is likely that Spider-Man will no longer be part of the Marvel Cinematic Universe, and that could be bad for both Sony and Marvel.
"When my father died, no one from Marvel or Disney reached out to me," Lee said.
In the end, no one could have treated my father worse than Marvel and Disney's executives.". »