We're told there was an issue with Samuray Del Sol's pre-screening tests to finalize his WWE developmental contract. Del Sol was believed to have completed WWE's stringent testing and signed his deal.
As of this writing we are unaware of what happened but Samuray has been led to believe that his WWE deal might be off the table. WWE tests for everything, including physical testing to make sure someone would be physically able to handle their stringent schedule.
There of course is the possibility that he is able to rectify the issue and move forward with his deal but right now it's worth noting there is a considerable issue.