Source: The Wrestling Observer Newsletter
UPDATE x2: As previously reported, WWE went to great lengths to keep the finish to the Brock Lesnar vs. Undertaker match at WrestleMania 30 and there were several people who were surprised that the betting odds changed quickly just before the show to make Lesnar the favorite.
There were reportedly even people who have to know the outcomes to matches within the company who believed that Taker would be winning the match.
UPDATE: It is being reported that Vince McMahon actually was not in attendance during the main event of last night's WrestleMania 30 pay-per-view. Word is that Vince left the venue, riding in the ambulance with The Undertaker as he was taken to the hospital after his match with Brock Lesnar. There was fear that he suffered a serious neck injury as well as concussion. The injury happened early on during the match. We're told Paul Heyman and Broick Lesnar also went to the hospital with 'Taker. Vince left Triple H and Stephanie McMahon in charge of running the rest of the show.
In regards to who knew about the finish to The Undertaker vs. Lesnar bout, it is being reported that only four to six people were aware of the finish prior to the show. They included Triple H, Vince McMahon, Stephanie McMahon, The Undertaker and Brock Lesnar.
ORIGINAL: WWE.com just posted the following:
WWE.com can confirm that, following last's night historic match with Brock Lesnar, The Undertaker was immediately taken to Ochsner Medical Center. After a CT scan and other medical testing, he was diagnosed with a severe concussion and was kept overnight for further evaluation. He was discharged early Monday afternoon.
Stay with WWE.com for updates on The Phenom's condition.