Olympus has a patent for 2 lenses.
- Olympus M 12-40mm f/2.8
- Olympus M 12-40mm f/2.8-4
We don’t know yet which lens will be made. This would give m4/3 uses at least 3 lenses in that range…. the Panasonic 12-35mm f/2.8, Olympus 12-50mm f/3.5-5.6, and one these lenses listed above.
Info from 1/3 Rumors