Website EXOPHASE has revealed the Achievement list for WWE 2K15. Some of the more notable things spotted are :
Ultimate Warrior is included (his in game picture is used for the Road to WrestleMania mode)
WWE development grounds NXT is included (an achievement in the game is to defeat John Cena using a NXT superstar)
Custom Arenas and Superstar Heads will return (This is my Yard achievement for creating an Arena, One of a Kind achievement for using a Superstar head. )
CM Punk has not been removed from the game (multiple achievements for completing Punk's Rivalry story)
Adrian Neville and Sami Zayn are also confirmed, as their pictures can be seen in the achievements.
*Error. Ultimate Warrior achievement is called "Road to Wrestlemania" and is gained by winning the title at Wrestlemania after winning the Royal Rumble. There is no Road to WrestleMania "mode".