Booker T revealed on Twitter that he will be working with Rich Brennan on SmackDown going forward.
Congrats to @RichBrennanWWE, enjoy the ride! #SmackDown
— Booker T. Huffman (@BookerT5x) August 28, 2015
No problem! Can’t wait to join you at the announce table in 2 weeks! #LetEmHaveIt https://t.co/UMJcpk3yct
— Booker T. Huffman (@BookerT5x) August 28, 2015
As noted, Brenneman was announced by WWE that going forward he would be the lead announcer on SmackDown. He replaced Tom Phillips in that role.
Booker T was originally on RAW as a color commentator but was removed from that role to be a trainer on Tough Enough.