Its up for me, but still limited to Dec 31st 2018.
As I know you are looking excitedly from your other thread. But to be honest I would just wait until Mid-August or even September before even trying to check for 2019 prices. DLR isn't like WDW where you have lots of tourists booking 12-18 months in advance. Most book less than 6 months before their trip to DLR.
However if you really are that concerned, why don't you call the vacation package number, (714) 520-5060, and they might be able to help you.