Keith Olbermann will be part of the roundtable on ABC’s “This Week with George Stephanopoulos” this Sunday. Olbermann joins George Will, Donna Brazile, Matt Dowd and Peggy Noonan. Olbermann was on “Late Show with David Letterman” earlier this month discussing his departure from Current TV. He was fired from Current March 30. Olbermann has filed suit against the network and Current has filed a counter-suit over the parting.