This should all be related to only Disney Springs as DHS is a fair bit further West on BVD. I thought the original plans someone posted had the center most lane as bus only, and the lane furthest to the right for Typhoon Lagoon. Once the new I-4 exit goes in with the new overpass into the garage, multiple lanes on the right were to go up the new overpass ramp for garage entry.
The road expansions over by DHS were originally for the Animation Suites, but could certainly be leveraged for DHS expansion.