That pile of bodies must have been huge. I started 6 guardians and they all awoke at the same exact spot. I'm pretty sure all of your guardians did too....
Edit: now that we're trending theories are piling up. We've got
-were all the same guardian across different time lines
-ignore it, it's a game.
-clown car theory
-Mexican drug cartel theory
-stack theory... falling guardians landing on other guardians
-The vex won and this is all a simulation
TOP ANSWER: That car was the site of a loot cave the fallen used to use. Engrams for days!!!
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It was a mass grave of all guardians