Well, according to official design sketches, Evas got rather featureless bodies and faces under all that armour. An EVA's external appearance is so critical to its identity that Gainax never really allowed any of them to be shown "naked". And anyway it never really mattered; what's striking about an Eva is not how alien it looked, but is instead how human it appeared to be. It has five digits per lirab (fixed error. ), fingernails, eyes, a mouth.
Unless the new movies somehow desire the Eva's physical appearance to influence major plot-points, I doubt that aspect will be explored.