#0 - July 11, 2011, 3:23 a.m.
I wouldn't expect the resource system reveal to be this big thing that needs to be revealed at some special event. I expect it to be something like that runestone preview where they show a bunch of clips showing how each resource system works.
Other than that, the other possibility is that it will be revealed on August 1st along with everything else. I'm not sure if they'd do that though as it would be a lot of news at once. Blizzard likes to spread out news every few weeks/months.
What do you guys think?