Complex sentence: In 1984, Hasbro acquired the licnese to for the transforming vehicle toys from the "Micro Change" subline and the Diaclone toyline and with help from Marvel Comics to flesh out the backstory, combined the two to create the Transformers toyline.
Split into simpler sentences: In 1984, Hasbro acquired the license for the transforming vehicle toys from the "Micro Change" subline and the Diaclone toyline. With help from Marvel Comics to flesh out the back-story, the two were combined to create the Transformers toyline.