The Ultimate line for Neca means a highly articulated figure with accessories. This is the first time a xeno is getting the treatment because they just don't have that much accessories. It's the alien warrior with an updated paintjob, in blue or brown, those are the two variants. The articulation is going to be the same as is the one on the domed alien warrior from the two pack with Burke.
So, new features include finger articulation, a small change in toe articulation, the bicep swivel is gone because we already have those in the elbows, swivels in the knees which really help the figure get into crouched poses and a swivel in the tail.
The Ultimate warriors will come with an opened egg, facehugger and chestburster, that's it. They'll come in a window boxed packaging like the other ultimates.