According to sources, the original plan was for Chris Jericho to feud with Dean Ambrose heading into WrestleMania 32. The idea would have been for Jericho to play off the idea of walking out on Ambrose and Roman Reigns at the WWE Night of Champions 2015 pay-per-view.
When WWE brought in AJ Styles, the plans were changed as Jericho specially requested to work a long-term storyline with him. Of course, this led to Ambrose feuding with Brock Lesnar.
Also, The Wyatt Family was originally set to interfere in the Ambrose vs. Lesnar match but WWE changed those plans as well.