12, 45, 75, ???

My OM-D bag has the 12, 45, and 75.  (and an ancient 500mm Tokina mirror lens)

What's the next number in this series...and when will it be announced?

A 135 and a 250 would fill that gap nicely...I think I'd like the 250 first.

[in case it's not obvious, no zooms need apply, I don't need a 25, and I have "macro" covered elsewhere]

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-Kenneth Sloan