According to NFL Network's Ian Rapoport, the Vikings have said "publicly and privately" that Adrian Peterson "plays for them or no one."
Short of being truly blown away by a trade offer, it appears GM Rick Spielman is all-in on waiting Peterson out, even if he doesn't report to anything Vikings related before the season. RapSheet did leave open the door for the Cardinals to acquire Peterson after the draft, but multiple reports elsewhere have stated the Vikings are unwilling to part with Peterson for future considerations. If Peterson isn't traded by next Saturday night -- and it currently appears he won't be -- he'll either be a 2015 Viking, or sitting at home.