Yeah I don't think they could have done more things wrong with that movie than they did (crystal skull). I mean, seriously, they could have chosen any ancient historical story to go on, but they choose to go in the direction of Aliens. I really don't have any idea what they were thinking, or how they thought that anyone would like that!
A conversation between the movie makers:
Steven Spielberg: So how can we tie this story all together, because quite honestly I don't see how the pieces fit.
George Lucas: Hmmm, Oh I know! Aliens! People will love that twist.
Guy that Should Have Been in the Room: WTF!! No! Are you kidding me, that's the best you can come up with?! That's the dumbest flippin' nit-witted idea I have ever flippin' heard! You already ruined Star Wars, Lucas, so just get out of the flippin' room, you cheeky slag!
Steven Spielberg: Aliens, yeah, I like it. Let's go with that. That will cut our pre-production time in half.