2012, aliens evolved humans, end of days?

Okay so I just got done watching 2012 which by the way was amazing. It got me to start thinking of possibilities. It states in that movie that every 325,000 years or so planetary alignment happens and then it has big problems for earth. Polar shifts, earth crust shifting things like that. So here's my thought. Something like that movie happened a long time ago, a number of scientists and such survived the catastrophe. Then they rebuilt civilization and worked on getting out of here so they wouldn't be so affected by the alignment. So if the earth is 4.1 billion years old couldn't this have happened several times. Some civilizations make the cut others don't? UFO's being the first set of humans predecessors to come back to earth seeing that we are "worthy" of being saved and how we've achieved so much. Adam and Eve story aspect by stating that the people that survived eventually had to breed inter familied. Couldn't this all be connected? So Aliens are evolved humans possibly? Alien sightings are getting more and more common simply because we are closing in on the date of the end? Eventually make us trust them and take us to somewhere safe? Have they done this before? Could this be jesus the savior? I'm a christian but i'm just being open minded. I want a scientific thought about this please no religious fanatics i mean absolutely no offense to any religon. However it does seem that all religons specify on one god. Not multiple so could this too be related? I'm simply thinking here, nothing too serious.