Balor
Zen MBB Master
First, I think this is worthy of note, entry-level shimano Sora is now 9-speed and have fully internal cable routing.
Next, this one seems very interesting:
http://www.bikeradar.com/road/news/article/shimanos-metrea-groupset-hints-at-1x-future-45114/
This Metrea bullhorn dual-control shifters with integrated hydraulic brakes seems like a cost-effective option as compared to Shimano/Sram time trial electronic groupset.
Next, this one seems very interesting:
http://www.bikeradar.com/road/news/article/shimanos-metrea-groupset-hints-at-1x-future-45114/
This Metrea bullhorn dual-control shifters with integrated hydraulic brakes seems like a cost-effective option as compared to Shimano/Sram time trial electronic groupset.