Doesn't mean any of the fights are fixed, just the lineup changes. Not necassarily a good thing, but I doubt there would be many people who would mind seeing Hoost at the final.

Keep in mind this is just another rumour, unconfirmed and in fact disputed by people close to Peter Graham. These kind of rumours surface all the time and its usually 50/50 as to which come true.

As for Sapp they did show his hand (which is more than they did for Schilt) and it was looking pretty swollen, didn't look like it was arranged and surely K1 corp would have wanted their biggest draw card to progress to the end?
As for the swelling going down in a couple of days, thats fairly normal. Injuries are always alot worse looking when they happen to what they look like 48 hours and a bucket of ice later.
As for fighting 3 weeks later, I guess we will never know exactly what the injury was, or what the doctor recommended. Probably just pumped him full of pain killers before the fight.