The Authority - All bad guys, they control WWE Triple H Stephanie McMahon Seth Rollins and his bodyguard lackeys Joey Mercury and Jamie Noble (J&J Security)
The Big Show Kane (unmasked as Corporate Kane)
The good guys: Randy Orton - multi-time world champ and former Authority member wants revenge on Seth Rollins for violently exiling him from the group
John Cena - Multi-time world champ currently chasing the United States Championship held by Rusev. He represents America in this feud as Rusev is an anti-American Russian (born in Bulgaria)
Roman Reigns - Rookie cousin of The Rock who was once part of a 3-man faction called The Shield with former partners Seth Rollins and Dean Ambrose. Won the Royal Rumble this year which puts him in the main event WWE Championship match against the current champ Brock Lesnar.
Bray Wyatt - Creepy cult leader who wishes to be the new face of fear. He is evil incarnate and wants to get rid of Undertaker once and for all so he can be the number one monster in WWE.
Daniel Bryan, Dean Ambrose, Dolph Ziggler, and R-Truth - Contenders for the Intercontinental Championship at Wrestlemania. All very talented at various stages of their careers and many fans would rather see them as WWE Champ instead of Lesnar or Reigns. Bryan in particular is a favorite, and won the WWE belt at last year's Mania, but was stripped of that title due to a neck injury.
Bad Guys:
Rusev - Russian patriot who hates America and is undefeated, last winning against John Cena by making Cena pass out in his submission finisher, The Accolade. To hammer the anti-American sentiment home, he is the reigning United States Champ
The Undertaker - WWE legend and respected veteran, who was just defeated for the first time at Mania last year. He draws power from his caskets, and urn, which is the source of his dark powers.
Brock Lesnar - former UFC champ now focused on dominating the WWE. Paul Heyman of ECW fame is his mouthpiece. He also is the only man to defeat The Undertaker at Wrestlemania, breaking Takers undefeated streak last year.
Stardust, Luke Harper, and Wade Barrett - contenders for the Intercontinental Championship at Wrestlemania. Wade 'Bad News' Barrett is the current IC Champ, and former bareknuckle boxer. Stardust is Dusty Rhodes' son, brother of Goldust, real name Cody Rhodes. As Cody he is a multi-time IC and tag champ but he recently killed off his Cody persona to become Stardust during a feud with his brother. Luke Harper is a former follower of Bray Wyatt.