As was reported earlier by Bryan Alvarez, Lesnar walked out of the building before tonight's WWE SmackDown after he learned that Vince McMahon would be retiring. Lesnar always dealt directly with Vince and he was said to be very upset by the news.
WrestlingNews.co was told that there is hope that Lesnar could be convinced to return to work SummerSlam and for now, they will hold off on announcing a replacement. So, don't expect Goldberg to be announced tonight in case they are able to work something out with Brock before next weekend.
We'll post more updates as we get them.