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obviously the release dates for the two expansions are on there, but there is also something called "sc2 phoenix" which i've never heard of; it seems like it is probably a feature not yet public.. its also pretty cool that it will only probably be about a year until heart of the swarm hits, i didn't realize it was going to be that soon.
there are also projected dates about the custom map stuff that i don't think have been announced yet, although i could be wrong. and yes, i know its possible that this is fake and that even if its real it is relatively outdated.