I am quite frustrated by this news
You and me are hardcore fans of the Alien universe. It is entitled to nothing at all in terms of trailer or date for us. While random journalists, casual fans have the privilege of watching excerpts and movie trailer ..
I recognize a jealousy towards those who have seen the film.
Otherwise off topic :
A Frenchman who saw the film said that there is a great massacre in the excerpt but that this massacre is not perpetrated by those we think