While it’s only temporary at this point, Brock Lesnar has been suspended indefinitely from competing in MMA while an investigation continues into his two drug test failures in advance of UFC 200. This is an expected move, and matches the similar suspension levied against Jon Jones, who also failed two separate drug tests, which led to his fight at UFC 200 being cancelled. Jones has said that his own investigation has revealed details that could overturn the decision, but it remains to be seen if the same will be true for Lesnar.
After competing at SummerSlam on August 21st, Brock reportedly returned home, where he is expected to remain for the immediate future. WWE has no current plans to use him until the Royal Rumble in January, at the earliest.