Extra magic hours predictions

anyone know when the schedule is released for extra magic hours? I know in the crowd calendar there are predictions but these are based on last year and very animal kingdom heavy. Do we think that there will be a switch to HS this summer or more evenly spread across the 4 parks? cant decide whether to take advantage of EMH or whether to go for the overall crowd calendar suggestions. need to book meals in 3 weeks so that will pretty much fix the day for each park