AJ Styles is sidelined with a back injury.
Prior to tonight's WWE Raw it was announced that AJ Styles would compete in a fatal four-way elimination bout that also featured Bobby Lashley, Braun Strowman, and The Miz. However, when Raw went on the air, AJ Styles had been pulled from the match due to an injury. Baron Corbin was named as his replacement.
In a backstage interview later in the night, Styles revealed that he felt a "pop in his lower back" at WWE Money in the Bank against Seth Rollins. Before Styles could reveal how long he will be out of action for, Corbin blindsided The Phenomenal One.
As previously reported, Styles is no longer being advertised for WWE live events until June 27. He is advertised as appearing at WWE Super ShowDown on June 7 but as of now is currently without a scheduled match.
Fightful will provide more information as it is known.