I don't believe we'll see that 3rd image (sketch) come to life in covenant. Its waaay too much for the movie execs, and takes it beyond AVP2 in terms of gruesome gore.
You can only disfigure or maim the human form so much to create monsters before it crosses a line on several levels - not least, taste. With an Alien monster you can get away with much more exactly because its alien and less resembling the human form.