Any speculating where toy story land will go? From looking at the concept art and google maps I was wondering if it would go behind the current TSMM. Seems to be the old costuming department, maybe some other workshops and some employee parking.
I was looking at this too, and I expect you're right. From the concept art, the current TSMM must be in the lower left corner. The question is which side faces the rest of the TS Land. If it's the current entrance, then the new land would require the demolition of GMR and a good deal of the area around and including Echo Lake. That's unlikely since it would shut down even more of the park than is (or has been announced) already. If instead it's the back of the current TSMM building, then the new land would cover areas that are occupied by LMA, the former Backlot Tour, some work facilities, and employee parking areas. This also makes sense when considering the work to add a second track to TSMM -- the construction can also include a new queue area entering from what is now the back. Also, the entrance to TSL shown in the lower right of the concept drawing would be around where OMD is now.
In thinking about how Toy Story Land and Star Wars Land will be phased in, it seems like things are further along for TSL -- already expanding TSMM and already have concept art for what the land will look like (as opposed to the much more conceptual drawings accompanying the SWL announcement). According to Wikipedia, Cars Land at DCA was announced in concept in October 2007 as part of a larger expansion, with Cars Land being the final phase of that expansion. Final concept art and rides were announced in September 2009, and Cars Land opened officially in June 2012. It appears that today's announcement may be more closely aligned with the 2009 Cars Land announcement than the initial 2007 announcement of the full DCA expansion. Assuming it takes the same amount of time to complete (3 years), this would have TSL opening in 2018. Toy Story 4 is slated to be released in 2017, so maybe they will try to accelerate completion to match (or maybe they'll keep it separate to generate more buzz, who knows).
My guess is that they will wait to complete the SWL expansion until after TSL is done so they have some attractions for small kids open before closing down Muppets and the HIStK playground. Since those areas may well be at the entrance area to the new SWL, it would probably be another year or two before SWL opens, putting it in 2019-2020. I'm basing this on another guess that the expansion will include land currently south of S. Studio Dr.
Of course this is all just speculation on my part. I'm curious to hear other theories.