Please use the FAQ for asking questions in the future (link in my sig.).
We don't know when the next update is - whenever GF feels like working on PT.
------------
Want to know when a pokemon evolves or what moves it learns? Having trouble uncovering hidden items? Visit the Official Pokemon Twilight Guide!
Got any questions about PT or the forums? Visit the FAQ!
Official Beta Tester for Pokemon Twilight
Highest poster on the GFF
Most active member on the GFF
66 (+2 special) out of 66 Pokemon Obtained on PTV5! Every single one of 'em!
At this point there's no way to predict when the next update will be. It could be in 2 months, or it could be as long as 8. We'll just have to wait and see.