I'm afraid it will suck like all the other 90's-present sci-fi movies.
Am in agreement with you in the tendency of 90's sci-fi to suck, but not ALL of it sucked.
Gattaca was great.
The Minority Report was not too bad either (apart from the cheesy ending).
Starship Troopers was fine satire.
I liked Serenity, it did not suck.
Its not perfect, but hey - neither were the Star Wars films, and that is one of the many reasons I like them so much (at least the first three).
Go and see it - we need a new francise that lets us laugh, and participate. Firefly/Serenity has the added bonus of an open and fun fan-base who are listened to and appreciated by the film-makers. Can anyone think of why this forum even exists?
Anyways that's all from me.