#1. WWE signs The Undertaker to a lifetime WWE contract
Rumor: The Undertaker retired from WWE (after confirming his appearance at Starrcast II)

There has not been a single more iconic WWE Superstar than The Undertaker. From making his WWE debut at Survivor Series 1990 to his most recent appearance at SmackDown Live, The Undertaker has been a cornerstone in WWE's triumph for over 25 years. So, when The Phenom teased his retirement after Wrestlemania 33, fans could not help but shed a tear.
WWE's huge mistake with John Cena revealed - Watch Here!
However, The Deadman was not done. He returned at the WrestleMania next year to defeat John Cena in a squash match. He made more appearances until his loss to DX at Crown Jewel. Since then, we've heard little about The Undertaker.
A rumor then started to do the rounds that The Undertaker's contract was up with WWE and that he would officially retire. Taker's confirmation to appear at Starrcast II, a non-WWE show, added fuel to the fire.
However, WWE responded to this buzz by simply signing The Deadman with a lifetime contract. Since then, The Undertaker competed against Goldberg at WWE Super ShowDown and teamed with Roman Reigns to defeat Shane McMahon and Drew McIntyre at Extreme Rules.
Paul Heyman's downfall need to be studied - Check!