@marni1971 can probably elude to it more than I can (or at least cast more intrigue and speculation, as he uniquely does.
) But in addition to the whole revamp of the spine and redo/demolition of the Communicore buildings, the back half of SSE involving Project Tomorrow and the former Corporate lounge is rumored to be removed and reimagined. It would also eliminate the current entrance to SSE in the front and relocate it and the queue to the back.
Timing wise it actually works quite well, because all the spine work would necessitate the closure and relocations of the paths around SSE for construction access from the loop road.