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Ambrose promptly began feuding with Rollins, which included Rollins costing Ambrose a spot in the Money in the Bank ladder match for the WWE World Heavyweight Championship at Money in the Bank and the duo attacking each other.
During this period Ambrose and Reigns quietly separated as a team, with Ambrose debuting new ring attire and new entrance music.
After being added to the Money in the Bank ladder match at Money in the Bank at Rollins' request, Ambrose lost the match when Kane attacked him and helped Rollins win.
Ambrose was scheduled to face Rollins at Battleground, but he was ejected from the arena by Triple H for fighting with Rollins backstage, and Rollins subsequently announced that he had won their match by forfeit, prompting Ambrose to return to the arena and attack Rollins.
Ambrose and Rollins eventually wrestled at SummerSlam in a lumberjack match, which Ambrose lost with assistance from Kane.
Ambrose attacked Rollins again the following night, causing them to face off in a Falls Count Anywhere match, which Rollins won by knockout when Ambrose was attacked by Kane and subsequently had his head driven through a pile of cinderblocks by Rollins.
Ambrose was stretchered out of the arena and the storyline was put to place to explain Ambrose's absence from television while filming Lockdown.
He returned at Night of Champions on September 21, attacking Rollins.
Following weeks of Ambrose attacking Rollins, the duo faced off in a Hell in a Cell match at the Hell in a Cell pay-per-view in October; Ambrose lost the match when the returning Bray Wyatt interfered and attacked Ambrose.
The next few weeks saw Ambrose and Wyatt taunting and attacking each other in both backstage and in-ring segments, with Wyatt claiming that he could "fix" Ambrose, leading to a match at Survivor Series.
Ambrose lost the match by disqualification after utilizing steel chairs, including a table.
This led to a Tables, Ladders, and Chairs match between the two at TLC: Tables, Ladders and Chairs in December.
During the match, a television monitor blew up in Ambrose's face, allowing Wyatt to win the match.
The feud concluded when Wyatt beat Ambrose in the first Ambulance match held on Raw.
Ambrose's booking during his feuds with Rollins and Wyatt was criticized by commentators, including James Caldwell of the Pro Wrestling Torch, who stated that although "he's a utility main-eventer", his lack of victories indicated that he was not a guy WWE was positioning "for a 2-3 year sustained run on top".
On the January 19 episode of Raw, Ambrose defeated Intercontinental Champion Bad News Barrett.
At the Royal Rumble, Ambrose participated in the Royal Rumble match, but was eliminated by Kane and Big Show.
The following weeks, Ambrose demanded a match for Barrett's title, which Barrett declined, leading to Ambrose attacking him, tying his hands around the ring post, and forcing him to sign a contract for a title match at Fastlane, where Ambrose lost the subsequent match by disqualification, but stole the championship belt afterward.
At WrestleMania 31, Ambrose participated in a seven-man ladder match for the championship, but lost after Luke Harper powerbombed him through a ladder and knocked him out of the match as result.
On the April 2 episode of SmackDown, Ambrose fought Harper to a no contest after Harper put Ambrose through a table.
On the April 13 episode of Raw, Ambrose attacked Harper after Harper lost to Ryback by disqualification.
On the April 20 episode of Raw, Ambrose and Harper once again fought to a no-contest.
At Extreme Rules, Ambrose defeated Harper in his first singles victory on pay-per-view since the Shield split up.
On the May 4 episode of Raw, Ambrose defeated the WWE World Heavyweight Champion (and former rival and Shield stablemate) Seth Rollins, and as per pre-stipulation by Kane, Ambrose was added to the WWE World Heavyweight Championship match at Payback, a fatal four-way match also including Randy Orton and Roman Reigns, and Ambrose's first opportunity for a WWE's world title.
However, at the event, Ambrose failed to win the title.
He also failed at Elimination Chamber as, while he won a singles championship match against Rollins, it was via disqualification, thus Rollins retained once more.
Despite the loss, Ambrose took the belt with him and challenged Rollins in a ladder match at Money in the Bank which he lost.
After Money in the Bank, Ambrose continued teaming with Reigns, and eventually helped him in his feud with Bray Wyatt after Luke Harper reunited with Wyatt.
On the August 6 edition of SmackDown, Reigns challenged Wyatt to a tag team match at SummerSlam, with Reigns and Ambrose facing Wyatt and Harper, which Wyatt accepted.
At SummerSlam, Ambrose and Reigns defeated Wyatt and Harper.
On the August 24 episode of Raw, Ambrose and Reigns fought Wyatt and Harper in a SummerSlam rematch.
During the match, Braun Strowman made his WWE debut, joining The Wyatt Family and helping Harper and Wyatt attack Ambrose and Reigns.
At Night of Champions, Ambrose, Reigns and Jericho were defeated by Wyatt, Harper and Strowman in a six-man tag team match.
Following Seth Rollins' injury, which forced him to vacate the WWE World Heavyweight Championship in November 2015, Ambrose entered a 16-man tournament to determine a new champion.
After defeating Tyler Breeze, Dolph Ziggler and Kevin Owens, Ambrose ultimately made it to the finals at Survivor Series, losing in a singles match to Roman Reigns.
