Disney has released a little more information about Toy Story Land this morning. One of the tidbits is a concept video of Slinky Dog Dash, the roller coaster coming to the new land.
The screenshot below seems to confirm the location of the land as being behind the current Toy Story Midway Mania building. We can see what appears to the be back of the Chinese Theater in the distance.
Also coming out of this mornings announcements is that the third track of Toy Story Midway Mania will be open by Memorial Day.