There is no news as of yet regarding what role Storm will play in the show or whether he is simply there as a guest.
If Storm has indeed signed a deal with WWE, he will be an absolutely huge signing for the company and would add major depth to a rather slim looking current roster. James Storm was one on TNA’s best and most consistent performers for years until he parted ways with the company recently. Ever since he left TNA, the rumor mill has been churning out story after story linking him to WWE but as of yet nothing has come of it. Maybe tonight will change that.
As was the case with Samoa Joe though, I would rather Storm made any potential debut with the company on the main roster, just like Joe, Storm is more than deserving of a spot on the main shows and would improve the roster immediately. It seems a little backward thinking to place guys like Storm and Joe in NXT first.