Well, we've previously established that a conspiracy replaced George Lucas with a duplicate. These guys basically want to use a fictional trailer in order to help spread the word about this alien plague that takes our most talented directors from us.
The result is a great mashup that will quickly point those that know towards Oldboy...although if you take that extrapolation too much towards its logical conclusion, then it becomes terribly disturbing. You know...just like Oldboy. Regardless, kudos to these guys for spreading the word. One day when we have full disclosure of the alien menace, we can get Lucas back, as well as Carpenter and now, it seems, Spielberg.
Found via Graham Linehan.