Terminal Shibuya station and surranding Shibuya station is going to be redeveloped according with Asia Headquoter specific district in Tokyo.
The construction is on going now and will be completed around year 2026.
Couple of highrise building will be built, and basement of Shibuya station would be more good access between difference train line, and building, hopefully.
Virtual future Shibuya here. ( sorry it is only Japanese)