The Guardian published an article about the relationship between comic book creators and the film studios that use their creations. Along with the financial impacts, including forcing comic book creators to self-audit the use of their creations. It's not a DC or Marvel sole problem. It's across the board. Including how Jerry Siegel and Joe Shuster signed over their rights to Superman for $65/each. And how Jim Shooter treated Jack Kirby to force him to forego claiming rights to any character