Well given that Ridley has a penchant for changing things, and how originally he had not intended to move directly into Alien back when he wanted to tangentially move further away, then I expect some explanation as to why this particular engineer was larger than those we've seen (genetically enhanced, perhaps?) and piloting a much more biomechanically designed juggernaut (older model?), these things won't be glossed over if Ridley intends to come in at the back end, thus how they'll handle it will be interesting. Again, I'm not hoping for an actual elephantine being, just pointing out that if the pilot's suit is completely enmeshed with its body then it became an elephantine looking creature/corpse, not that it was an elephantine being in actuality prior, and this is something they could play with if the suit was affected by the accelerant in some way, it'd be a pretty cool compromise. It could just be how the suits deteriorate, but yeah, there's some room to play around there potentially. Personally I'd prefer if the derelict was very ancient, perhaps we may see more of it; other chambers, etc, but given the climate on 426 then yeah, I could live with it not being ancient.