It doesn't look like WWE Saturday Morning Slam is coming back for a second season. The show aired on The CW as part of their Vortexx Saturday morning block from August 25, 2012 to May 11, 2013.
The original order included 38 episodes and if there were plans for a second season, it was to begin airing again in August, which was what WWEtold us when we reached out to them for comment in May. While I know there was some internal thought the two parties were close to an agreement for a second season, it doesn't appear to have happened.
There is still a page dedicated to the show here on the official Vortexx website.