Thorgi Duke of Frisbee

Deadline says he'll be taking a lot of it from the 125 pages of annotations in the Return of the King novel, so it's going into other works, albeit from the same universe.

I wonder if they'll get the rights to some of those novels that Tolkien's son completed.

Well one bit not covered in either book but did happen is gandalf scouting out south mirkwood n then post-hobbit removing the dark sorcere, aka weak sauron, from mirkwood with other wizards. Hence radaghast brown being in.