from mmo
In this conference call we also learned that:
The next patch will include "major raid and dungeon content", we can most likely expect a raid and a 5-man from Patch 4.3
Patch 4.3 will be the "largest content update since Cataclysm"
It will be released later this year, which means that we can probably expect a PTR soon.
I'm hoping the PTR is soon