Aliens - what will they look like

If the conspiracy theorists about greys are true, they'll look like this: 👽 The theory being that that image has been used as the archetypal image of extraterrestrial life so that if people ever encounter them they will be a sense of familiarity so we're not crapping ourselves when we come in contact with them.

Though I like the idea of them looking like something from that Discovery mockumentary Alien Planet in that they're truly alien and bear little resemblance to anything found on Earth.