I really don't see what was so bad about Crystal Skull. I always hear people talk about how silly or unrealistic the alien skull was but I don't get it. If Indy can find a 700 year old knight and the Holy Grail then he can find an alien.
I didn't liked the movie but not because of its sillyness, I was expecting that actually, but more about the whole "nostalgia" deal that it seems so prevalecent nowadays. They bring old characters for the sake of it, just for you to get a fix of the old times. Mutt is an
awful character, and I couldn't stand him - that guy just ruins the screen for me. Oh, and that part with all the monkeys... like, seriously...
Even for a Indiana Jones movie, there were situations in which it was quite hard for the suspension of desbelief to kick in, like the infamous refrigerator scene. I know he has done some pretty crazy stuff in the past, but you may as well just say "yeah, he's immortal" and remove any form of tension from the rest of the film.
And last, the alien stuff isn't bad per se, it's just so off with the whole saga. I liked the idea of man-made magical artifacts with mysterious powers, the whole concept of not knowing how those things came to be. Imagine if in
THE LAST CRUSADE Jesus came walking and said "yeah, that's my cup", which it's pretty much what happened with the crystal skull. Not to mention, my favorite scene is when they carry the ark into that huge warehouse, which was completely ruined as soon as
KINGDOM OF CRYSTAL SKULL started. Any sense of secretness about that place was gone.
Overall, for me, it was a pretty bad movie. The parts were it got fun was just more of the same, so basically, I would rather watch one of the older ones instead. Another lame excuse for an idea in the form of a reboot, like
STAR WARS.