Sure it could happen, but What Auburn had on the OL last year (5 senior starters with experience) is something they have managed to do repeatedly, and in those years they have made significant runs, but even with that last year they had a forgettable season, except for catching Bama at the right time. Nix is probably a good QB but not necessarily the right QB for that system. If his dad didn't go there he would not have chosen Auburn and I think his dad should have pushed him to go somewhere with a modern pro style offense. But whatever, War Eagle and all that jazz. With starting from scratch on the OL their is going to be a price to be paid, we've been there, done that, got the T-Shirt and like coach Saban said, you can't coach experience. Nix may not survive the season.
Defensively they had one of the best units in college football But Alabama with a backup QB making his first significant start torched them for over 300 and Harris gutted them for over 150 and hung 45 points. Clearly they can be had and lots of coaches are reviewing that Bama game film as we speak.
So yea, it can happen, but they may need more than just the usual "Auburn Luck"