You're not.
I don't know if I'm reading into it too much, but with all the trailers and marketing being done for this... makes me wonder if the brass at Fox know this is a dud. Seems quite desperate to get asses in the seats.
Could be but they may also know that its going to be a big hit too. Remember this was scheduled for August and Fox moved it up in part I'm sure because Ridley wrapped it up much quicker than expected but there was also a lot of buzz around how confident Fox was in the film. That still may not be saying much since its Fox but I'm just being hopeful that we will get a great Alien movie.
Having just re-read that last line above I realized how silly it was for me to say the words - "a great Alien movie" but I remain optimistic.