I really don't know at this stage.
Hard Brexit, Brexit-light (Fudgit) or long-grass-and-eventual-stay-in?
Really can't decide.
Hard Brexit (tough border controls, WTO rules, out of single market) would appease the more swivel-eyed Tory party lot and hard-Brexit Leave voters; but can any politician really think that a) losing the single market would be good for the UK and b) tough border controls would be comfortably sustainable, practically or politically?
long-grass-and-eventual-stay-in: unlikely but stranger things have happened. May actually be long-grass and then eventually gets taken to the electorate in the form of a general election, presenting us with clear Brexit plans.
Fudgit: seems the most likely to me, but depends on how hardball the EU and May both want to play. I think this would involve something like an emergency brake on immigration of the kind floated around Brussels recently, but the details of it I can't envision.