P.S. The LAWA Executive Management Program Status Reports can be accessed here:
This is their latest update (from November, page 41):
Originally Posted by LAWA
The dry-in work for the secure passenger connection between Tom Bradley International Terminal (TBIT) and Terminal 4 is complete. Work progresses toward the February 2016 opening.
The project schedule was impacted by the discovery of unknown utilities which necessitated re-designing the foundation in the landside area. The project team has re-prioritized the project scope so that key components related to the passenger walkway will be completed close to original schedule target date. The project team continues to work with the contractor to mitigate any further delay with the remaining work.
Reading a bit deeper, work on the walkway should be finished on February 25 and the project completed on May 25, 2016.