I just spoke with someone backstage at Super ShowDown and I am told that trainers are checking on Goldberg and the belief is that he may have suffered a concussion.
As many of you saw during Super ShowDown, Goldberg went for a spear but The Undertaker moved out of the way and Goldberg crashed hard and head first into the second turnbuckle. The was a large gash on his head and that is when the match started to fall apart.
Official backstage were in constant communication with the referee through his earpiece to check on Goldberg, who seemed groggy through the rest of the match. Eventually, it was decided that the match needed to end so an audible was called and Taker finished it with a chokeslam and pin. You could see that Taker was clearly unhappy with how things played out during the match as he trained hard to make up for the poor performance from last November at Crown Jewel.
I will post an update when I get it.