@Alzrius and
@Parmandur Kinda Sorta, Maybeish?
Brian R. James is the guy who created the "Grand History of the Realms" online over the course of the 90s. He collected timelines and information from 35 different books and got the attention of WotC who eventually hired him to compile his work into a book they then sold.
en.wikipedia.org
In 2003, Brian R. James tried to create a full Temporal Chronology for all the D&D Campaign settings at the time.
He -had- been hired by WotC, but they didn't use his full Temporal Chronology, only the Faerunian one, which was published in 2007.