Brock Lesnar will answer Triple H on RAW's 1000 episode

Since Paul Hayman and Brock Lesnar set up two lawsuits against Triple H, COO of WWE, Triple H was busy in lawyers, courts and paper work and so was unseen for some time but at No Way Out Triple H said that his left arm, which was injured by Brock Lesnar when Triple H fired him, will be fine in a couple of weeks and so he wants to face Brock Lesnar at Summer Slam in a one on one match as he is not a cooperative person and for the whole life he used to fight in the ring and so he wants to settle this too at Summer Slam as till then his left arm would 100%.

Paul Haymen told Triple H that Brock Lesnar would not put down his lawsuit against WWE at any cost. Triple H said that he knows what Brock Lesnar wants, he wants to be a star in the spot light and if he accepts this challenge his face would be on the official poster of Summer Slam 2012 and told Haymen to give this message to Brock Lesnar. After two weeks Brock Lesnar had to come out and answer Triple H's challenge of Summer Slam but Paul Haymen announced that Brock Lesnar will answer to Triple H and 1000th episode of Monday night RAW.

There's hardly a chance that Brock Lesnar refuses to accept that challenge because he loves fighting and when he is getting every thing what he desires of by accepting a challenge there's no reason that Brock Lesnar would step back unless Paul Haymen have something else in his mind.

this would be the official summer slam poster if Brock Lesnar accepts the challenge