Only one more episode of The Sword in the Star was completed. It was beautifully illustrated by a young Keith Giffen (his first pro work!) and appeared in Marvel Preview #7 (Spring 1976) starring...Satanna? So, as you can see, Mantlo's epic was quickly made filler-fodder. Man, reality really stinks sometimes. (And yeah, Ol' Groove'll share that Mantlo/Giffen masterpiece with ya in the near future if ya want me to, so cheer up!)
Boisterous Bill did eventually find a way to complete his epic, though it must have morphed far, far away from his original intentions as Wayfinder found his way into the pages of The Micronauts in the 1980s. Via flashbacks we learn that the prince finally found his sword which evidently led to the creation of the Microverse, Time-Traveler, and the Enigma Force, all core-concepts of the Micronauts' own mythology.