I liked KOTCS! It has flaws but it is very enjoyable. (gee people, it is fine if you hated it - just stop bragging about it)
And I would like to see another Indy!
I admit, I didn't have slightest idea what could be #5 until I saw this post:
Chinese commies is the best idea I found up to now (not exactly a global threat, but better then again Russians, and way better than Nazis).
Time period: early sixties.
Macguffin: with China and surroundings there are many possibilities. For instance Terracotta Army, Yeti being surviving Neanderthal and origins of Homo Sapiens, or my favorite: something to do with dragons (though this sounds like a Tomb Raider). OK, this is not easy as it seems...
Other then Russians and Chinese, the only other villains would be some cult, or Freemasons or such conspiracy.
I couldnt agree more. Lucas came up with Indy, he can do whatever he wants with it and the fans will always watch it a million times, say it sucks, whine for the rest of their lives about it, and then buy all the DVDs. I dont think that half of us could pull off something like Indy ever, if you can do better, DO BETTER!