It looks like the 2018 ones came out in June 2017. Is June the typical time frame? We have a trip planned for Jan 6-12, 2019 and are planning on adding the dining plan.
Did the DDP price increase in January? It looks like it's the same price now. I think it was only the tickets?Unfortunately, there is no rhyme or reason to when they increase the price of dining plans. There's even a rumor out there that there's a price increase coming soon and they just went up in January. I don't believe the rumor, but I've been wrong before.
Edit to add: Price for 2018 came out in mid-June. That price should not change for 2018.
For 2019, the price should be announced around June-July 2018. There's usually an increase.