Antec uploaded a photo of Torque, an upcoming aluminium case with an open-air design. It's a pretty wild design that promises amazing airflow, but it's definitely not for everybody. There's a tempered glass side panel to offer some protection for your hardware, and the interior is roomy enough for a motherboard of up to E-ATX form factor. Antec also mentions that the case supports USB 3.1 Type-C.
Pricing and availability is unknown, but this looks like a pretty expensive chassis.