restless farm-boy searching for adventure
older man with tie to father's history shows up and is a role model
After a bar fight, farm-boy stares up at his destiny on the horizon
boy decides to follow older-man into outer space.
They witness a planet getting destroyed
Boy storms space fortress with grumpy older boy to rescue important person (in this case, older-man)
Boy helps rescue older-man while grumpy older-boy uses fancy flying to save the day.
It's Star Wars wearing a Star Trek costume.
yes, a lot of the plot points can be distilled down to basic Campbellian sources, but knowing the people behind the movie, and knowing their influences, it's pretty hard to argue that Abrams and Lindelof didn't take Orci & Kurtzman's drafts and layer a thick coating of Star Wars over the top of it.