The original estimates (by fans I should add) had this opening around the summer of 2018 with Star Wars following in 2019/2020. There were even rumors at one point that Disney was going to try to hold the premier of
Toy Story 4 at the land in 2018 to celebrate TSL's debut. That said, if you look at the concept art and info released at
D23 in August of last year, it differs a fair amount from the concept art they're putting out now. On the surface, things look unchanged, but if you look at the small details, many have been downsized or removed entirely. The coaster itself saw a number of unique elements removed from its layout. My understanding is that this may in fact be an effort to not only cut the total cost of the project but potentially get it done quicker. Parts of the site have already been cleared on this project (I know ground has already been broken on Star Wars), and I'm hearing they may be aiming to complete the build within 20 months (which is doable, given the "dumbed down" rides), which could put TSL opening by the 2017 holidays. Star Wars would then follow in 2018 or (more likely) 2019.