Speculation: for 2018 they might bring IsoSpeed to the Speed Concept along with redesigned brakes and possibly a redesigned downtube along the lines of the Velocite/Pinarello Bolide. If they go to the plug-in mono extension only (which they should) they could potentially do integrated front-end hydration as well (Ala Rafael/Scott/Canyon/etc).
They really need to do something with the brake track on their Aeolus wheels and they should also try partnering with someone like Vittoria to update their 22mm aero tire... because, frankly, the Aeolus wheels are really fantastic other than the brake track and the only way you're going to make a bike like the Speed Concept faster is to optimize the whole tire/wheel/frame system (in my opinion).
They really need to do something with the brake track on their Aeolus wheels and they should also try partnering with someone like Vittoria to update their 22mm aero tire... because, frankly, the Aeolus wheels are really fantastic other than the brake track and the only way you're going to make a bike like the Speed Concept faster is to optimize the whole tire/wheel/frame system (in my opinion).