I imagine the first 30 mins will be the usual recap of everything we already know, the next 30 minutes will be talking about island sanctuaries as the big new thing, and then a few more teasers of the next tier of Pandaemonium. They will pepper in some abstract discussion about job changes at some point and not really give too much since they are probably holding off on all major changes till 7.0. All in all, a normal pre-patch live letter.