Complex sentence: Mangold is negotiating now to write the treatment for the film, with Lauren Shuler Donner returning to produce, and told that the sequel will be inspired by any other popular Wolverine stories from the comics.
Split into simpler sentences: Mangold is negotiating now to write the treatment for the film with Lauren Shuler Donner returning to produce. Mangold told that the sequel will be inspired by any other popular Wolverine stories from the comics.