E-mount lens lineup update

You can mount long lenses on a e-mount using an adapter, so I doubt there is any merit in a '200mm maximum' because of flange depth argument.
The simple truth is the demand for the lens you ask for is likely modest -- I worked in photographic retail for five or six years, and never once sold a lens that exceeded 300mm in length.  You're asking for something over 500mm equiv. -- a very small niche, IMHO.  A 200mm lens in APS-C represents the high end of any tele that was available in volume for FF.
The 'P' likely stands for 'power', as the newest 18-200 is a power zoom likely targetted at video shooters.

Cheers,
GB

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