- 10-23mm f/2.8-4 (eq. to 15-34mm) smaller and lighter then current 10-24 f4
- 16-70mm f/2.8-3.5 (eq. to 24-105mm) similar size to current 18-55 f2.8-4 better with macro abilities like oly 12-40
- 70-275mm f/3.5-4.8 (eq to 105-412mm) similar size to current 55-200 f3.5-4.8
All with size, weight and AF speed in mind, water resistant and sharp at all focal lenght even wide open.
Match them with a new sensor XT-2 with 5 Axis in body/dual IS stabilization and I could go anywhere.