The Undertaker was taken to a nearby hospital in New Orleans after last night’s Wrestlemania 30 according to a report by Dave Meltzer. This was due to fear by WWE that Undertaker suffered a concussion and a possible neck injury after he took a bad fall on the outside early in his match last night with Brock Lesnar. Undertaker was expected to remain in the hospital for observation overnight. This was said to have no bearing on the finish to the match last night, which went according to plan. 

Source: Figure Four Online/The Wrestling Observer