Pretty accurate, I think. However, you missed the parts about The Last Word and Jaren Ward. Jaren Ward was a hunter who was (presumably) the original owner of The Last Word. He arrives in Palamon, which is a village outside the City's walls, and encounters a (again, presumably) young Shin Malphur. Magistrate Loken runs the place and tries to get Jaren killed in a standoff with 9 soldiers. However, Jaren kills Loken and proceeds to take in some guys later on to hunt down a dangerous Guardian (which we later find out is Dredgen Yor). Shin is a part of that group (not yet a Guardian). They finally track Yor down, and decide to rest for the night before confronting him. However, Jaren decides to go alone and they have a standoff at Dwindler's Ridge, with Yor killing Jaren. Shin waits for Jaren's return to the camp while the rest of his group start leaving one by one. Not too long after, he hears the shots of something "hushed, cutting" (Thorn) and starts to believe that Jaren was killed. Inevitably, his Ghost comes back to the camp, sees Shin, and presumably transforms him into the Renegade Hunter. Shin Malphur then takes his revenge by killing Dredgen Yor with The Last Word at Dwindler's Ridge. Also, legendary Hunter Pahanin Errata was the creator of Super Good Advice, AFTER he spoke and learned of Kabr's trials in the VoG. He became afraid of ever being alone in the wilderness again, so he created a self-aware heavy machine gun. There was also legendary Titan Wei Ning, who was a part of the crusade on the Moon, ultimately being killed by Crota. This may have had some effect on Eriana-3, an Exo warlock who was a part of Eris' ill-fated fireteam. She swore to get revenge for "her-them" (and she specifically saw visions of Wei Ning, who is a female, dead on Crota's blade when she tortured a captured Wizard). All of the stuff above is fairly unimportant but I think interesting, and might be good to include in your otherwise accurate theory :)