we dont know !
i've seen on YouTube that target has a trailer for it
http://www.buddytv.com/articles/twilight/new-moon-trailer-might-be-out-28552.aspx
The trailer for The Twilight Saga: Eclipse came out quite a while ago, and the movie came out on June 30th, 2010, in the USA. You can view the trailer on various fan websites or YouTube.
the book eclipse will be the third twilight to come out!!! (so a long wait)
They need to finish at least a third of a movie to make the movie trailer so it will come out around December 2011.
A very very very long time ago but the new moon trailer come out on the MTV awards
their are no fith book it only has four books everyones hoping that she come out more
Most likely in May. Do to the fact that New Moon started filming ruffly around the same time as Twilight , and Twilight Teaser Trailer came out in May!! So I think May!!
it comes out June 30 2010.
June 30th 2010
The third movie in the Twilight Saga, Eclipsebegins filming in August, 2009 and is tentatively scheduled for release on June 30, 2010.
search google with Download twilight Trailer