For sometime, an LSST Extragalactic Roadmap has been under development:
The goal of this Roadmap is to identify the key preparatory science tasks for extragalactic astrophysics with LSST that need to be researched before first light. Input into this project has waxed and waned, but as we approach ever closer to the operations of LSST reinvigorating and completing this document may help organize efforts across several LSST science collaborations. The LSST Galaxies collaboration will be revisiting these efforts during our coming workshop in July (everyone is welcome, please register!):
A breakout session with the rest of the LSST community at the LSST2016 would help us coordinate with the other collaborations and undoubtedly improve the quality and impact of the final product.