It looks like somebody has edited the WrestleMania 32 article on wikipedia and has added 4 matches to the match-card of the event. The four matches put on the card are:
“Stone Cold” Steve Austin vs. Brock Lesnar in a Texas Death Match, The Rock and Ronda Rousey vs. Triple H and Stephanie McMahon, The Undertaker vs. Sting & Seth Rollins (c) vs. Dean Ambrose vs. Roman Reigns (WWE World Title match).
Wikipedia has still not corrected the article as of this writing and you can check it by clicking here.
Below is a screenshot of the matches put on the Wikipedia page: