We have talked about this for a long time, but expect a formal announcement from Disney that Disneyland ticket pricing will be switching to a new tiered system very, very soon.
Rumors of Disney Parks going towards this kind of pricing system have been rumored for years, so much so that some of the competition has researched such pricing, and some other parks have even rolled it out already (namely Universal Studios Hollywood):
Under tiered seasonal ticket pricing, ticket prices can be higher or lower based on when you are visiting. Peak seasons like the summer and the Christmas season would be most expensive, while “off-season” months like January or September would be the least expensive. We have not yet received any pricing charts or information, but we expect a formal announcement from Disney soon.
UPDATE: Walt Disney World is expected to make similar changes to the ticket pricing structure over the weekend. We expect a Disney announcement soon.
We have since found out more information on this new ticketing structure which you can read here.