sounds about right.
As Killclimbz said, because of the terrible season last year...etc...there are no rules so just relax. At the most it will go up by about $50 between now and opening day (nov 10ish this year?). It looks like they have not increased the prices at all this year from last. Before Vail bought all the mountains and forced prices down, they were over a grand, still are in Canada...If this year is epic they will surely be more next year.
Everyone can only speculate, this is a marketing tactic. You could call/email Vail but I'm sure they would give you a canned response designed to sell you a pass sooner than later.
Vail didn't force the prices down. You can thank Winterpark for that. They started this whole cheap season pass thing in 97 when they offered four unrestricted season passes for $800. Vail was charging the full amount, but at Sniagrab no one was lining up for any of their resorts. VR quickly changed their tune and offered the same deal. Since then, it has morphed into what it is now. So prices started at $200 a pass and are now at around $500 for multiple resorts several years later.