I like the look of the new teaser, but as a teaser I think the first one is much better. Itīs just talking people again as far as I can see and I still have no clue whatīs it about. The new "enemy" is not very frightening at all, mostly because of his limited ability to speak - you should consider looping the audio on this one. The "scream" scene feels rather amateurish, probably also due to the less than perfect audio.
Iīd love to have seen some location - planetary or bridges scenes - or even some starships. It is set in space, isnīt it?
So, all in all - a good base, but lots of room for improvement.