Shivering Isles was not designed for a different character, just like Tribunal wasn’t designed for a different character. You could choose not to do it, but it doesn’t mean that it isn’t there. One guy or gal did all those things which is what makes it EPIC. To partition the job out to numerous heroes is just lame.
Its fact that the Champion was not the one who rebuild the Knights of the Nine, dont you read the books in Skyrim? they never mentioned the Champion, so this idea is not out of proportion.
What you claim as evidence are vague references of things that did happened at the time, sorry but no matter how much you want to push on us that the Champion became Sheogorath with the "evidence" its just not going to happend, if you liked your char as Sheogorath fine, my char on Oblivion was never the Champion because i never followed the main quest too and my char even aknowledge the existence of the Real Champion of Cyrodiil, how can you explain that? i thought TES games were as BE WHO YOU WANT TO BE, GO WHERE YOU WANT TO GO.
Give HARD EVIDENCE that Skyrim Mad God is the Champion, not vague crazy comments from... a nut God.
Oh and i am not denying the Lore of Shivering Isle, all that did happened because Bethesda made it official, but i doubt the Champion became the Mad God because there is no evidence of what people been claiming all along about Champion being Sheogorath, also not every single Player Character became the Champion or even the Mad God, i tried shivering isle for a while and went back out, never looked back.
How did my char became Sheogorath if she wasent even the Champion? to top that... she didnt even meet Sheogorath, so stating that my char turned into that guy from Skyrim is just ridiculous... Yes, thats Sheogorath! he did defeated Jyggalag and became the Mad God... yes, WHO EVER THAT IS... because thats not my character and for the 100th Time, there is no evidence Skyrim Mad God is also the Champion.