Come to think of it, ADI or anyone working on the film has never mentioned the egg design. There were no eggs in any of the various pics, or footage in any of the multiple trailers, yet we have seen the chestbursters, the facehugger design.
If there are no eggs at all, you can't have egg morphing. So unless they purposefully didn't show any eggs and didn't talk about working on them as not to spoil the egg morphing suprise(really not much of a suprise, considering it was speculated months ago),
this confirms the worst of the worst, just puking embryos in people and at an alarming rate as well, considering the town gets overrun. If the warrior aliens are doing it to, it will really f**k with continuity since they've never done that in any of the alien films. (i refuse to believe the alien in the first film puked down bretts throat)