When IDW took over the Transformers license, they were approached by Holmes as well, loved his idea and he collaborated with Furman to further tie-in the story into the continuity of the IDW-published Transformers comics.
When IDW gained control of the Transformers franchise, they were approached by Holmes, who shared his concept, and he teamed up with Furman to further connect the story to the existing IDW Transformers comics continuity.