Here's a point to consider - plausible aliens
Space aliens in movies were kinda similar for a long time. Lots of humanoids (amazingly the same size and proportions as humans) or butt-ugly weird looking things meant to unsettle with their ALIENness.
Planet of the Apes did something totally different by using a future Earth full of basically Earth creatures. For the first time, English-speaking humanoid aliens made total sense. The humanoids are plausible because they're our genetic cousins, they speak English because that was a dominant language from their past. For all its gee-wow, even Star Wars had no explanation for why the inhabitants of a far-away galaxy were basically human. In Planet of the Apes it all made sense for once.
Biting the hand that feeds IT
