Skull was soul-less. I did like the introduction of the Russians, I think they nailed the content for the era perfectly ... but then they jumped the shark. You can get away with the impossible in movies, but you cannot suspend disbelief of the improbable.
Spielberg and Lucas need to retire and begin allowing younger blood into their productions. How awesome whould Indy IV have been if it had been directed by a Speilberg in his 20s?!
Rehashing old franchises is just cashing in on nostalgia. If Skull had been released as a stand-alone film without the previous films existing it would do much less business IMO.
I'm waiting for Zemeckis to screw with Back to the Future in his stupid CGI actor style to completely annoy me.
The only director of the 80/90s blockbusters who seems to have kept his marbles by keeping out of the limelight is Cameron (yeah, I enjoyed Titanic, what's it to you?!)