Hours have been posted through April, and that's as official as it gets right now. Unless someone here works in the department that sets park hours, you're probably going to have to wait like the rest of us, unfortunately.
Besides, if anyone heard rumors of possible summer hours now, they'll be wrong in a day. We went in January and the hours and parade times for our trip changed 3 times - 2 of which were the week before we went.
They don't have a clue what attendance is going to be like in a week, let alone in 4 months.