After RAW went off the air, Daniel Bryan was stretchered to the back. John Cena then came out for the dark match main event, where he was supposed to team with Bryan to take on The Wyatts. Cena told them that they stole someone's entrance and out came... The Undertaker!
The Undertaker and Cena hit Harper and Rowan with their finishers to end the show as Bray Wyatt retreated to the back.
Article taken from: http://www.wrestlinginc.com/wi/news/2014/0317/572303/what-happened-after-raw-went-off-the-air-the-undertaker-appears/#MsOyTUMkftpdaQZu.99