Art Asylum forum user "Mirror Mirror" has obtained the latest Forbidden Planet catalogue and scanned in a page confirming that Corgi will be expanding it's die cast ships lines with three new ships later this year. The ships as previously rumoured will be the USS Defiant, USS Voyager and a Romulan warbird.
The new ships will join Corgi's existing Star Trek fleet which consists of the USS Enterprise (NCC-1701), a Klingon Bird of Prey and the USS Enterprise (NCC-1701-D). If the catalogue date is accurate they should be out in September.
See Mirror Mirror's original scan here, and join the discussion at Art Asylum's forums here.