Nicely done! Although... Does it feel like something might be missing to anyone else? It feels like it to me. Hmm... Maybe make the shoulders bigger? Make the mouth go slightly around the head? I don't know anything about modeling, so I don't know how difficult it would be for you. Eh, it looks good enough right now, so maybe I should leave well enough alone.
I'm just gonna give you a overview of how this will go. I will first add the original 10 aliens, then there will be a update that will add a story mod which you can turn off in configs. Then I will add the last off the aliens from the original series. Then alien force and they will be added in the order of the series. Then Ultimate, then omniverse because some people do like it. But the newest series will not be added. fusions will be added as well but last. If there is any questions please ask me.
To answer the question of will we make a generator rex mod. I am going to say this. I don't know what that is, so I will look it up and if I do decide to make one it wouldn't be until after at least ultimate alien.