It would kinda defeat the purpose of releasing Goodra. I can't see them bringing Goodra back after leaving Goodra behind with no promise of Ash to come back or anything. This isn't like Squirtle, Charizard, or Gliscor. Also Snorunt was added pretty late in AG if I remember.
The 8th Gym is right around the corner and we know this gen is ending now due to the new games. He needs at least 6 pokemon to enter the league with.
There have been no merchandize hints of Ash capturing anything anytime soon so I find it highly unlikely.