It has long been my tin foil hat theory that the Shadesmar Sun is the body of Adonalsium. This post is my attempt to find evidence that supports this. Please help, or if you can find anything that explicitly contradicts this theory, that would be appreciated.
Support for:
1. In world religions in Cosmere generally are built on foundations of historic events. A few Szeth quotes give us insight into the Shin religion, and it's belief that the "god of gods" is a sun.
WoR - I10 Szeth - He did not look up, he would not meet the gaze of the god of gods, but it was good to be in the sunlight.
WoK - 71 Recorded in Blood - Szeth kept his eyes down, partially to imitate the look of a worker, partially to lower his gaze from the blazing sun above, the god of gods
2. In a similar vein, Adolin's name comes from "Adoda" meaning light, and "lin," meaning born of (Adolin = born of light). Adoda could be derived from Adonalsium, and light derived from a sun.
3. In Dawnshard, the mural seems to generally be accepted as being a depiction of the shattering of Adonalsium, and what does it depict? A sun!
DS - 16 - It depicted a sun being shattered into pieces... She knew it was being ripped apart like a person on some awful torture device
Points currently against the theory:
1. These quotes are all Stormlight, I have yet to spot any in other Cosmere books.
2. (Sort of a repeat of the first point, but) as far as I am aware, the Shadesmar Sun is only visible in the Rosharan cognitive realm.