The next lens coming from Sony could be the new 85mm f/1.8 fast tele prime lens. There is no info yet about the price but as we heard this lens should come within 1-2 months. And Sony may be not the only one announcing a new lens for a mirrorless system. Also Olympus could announce a new lens soon. But it is defintiely not the 40-150mm f/2.8 lens. That rumor got busted!
P.S.: Just a reminder, the three Zeiss primes for the NEX and Fuji X system should arrive in April!