What m4/3 lens would you like to see Panasonic/Olympus come up with next?

I agree with the others who've suggested a 300mm f4 or 400mm f5.6 high quality prime which can be used with teleconverters. An alternative is a quality zoom with these sort of specs at the long end. I think it's essential that Olympus, Panasonic, or possibly Sigma or Tamron make at least one lens in this range. This type of lens tends to be very popular with wildlife photographers and especially birders.

It's essential for Olympus and Panasonic to have at least one lens in this range. If they don't fill this gap those who consider such lenses essential will tend to look at other systems. m4/3 will unnecessarily be limiting it's appeal if they don't fill this gap.

It's also necessary to produce some high quality teleconverters to go with it. In addition I'd also like to see a good close focus of at least 1:3.