Matthew said:
but this "sci fi B movie" thing is the last influence I expect for these films! I'd been open to a dozen other changes but I'm at a loss for words... except I just hope this is a concept Lucas is just raddling off in his head and is not actually carried out by a wiser Spielberg.
Yes, but several other times in the article, they say that the style of the movie and the way it was shot are consistent with the first three. So that clearly doesn't mean they've changed from emulating 30's adventure serials to emulating 50's sci-fi movies. I think he's referring more to the subject matter.
The crystal skulls are classic Indy IMO, an ancient mysterious relic. But in the 50's, the B-movies dealt with things like atomic bombs spawning radioactive monsters, or UFO's and such. The way I see it, they're not so much forcing the movie into a 50's mold; they're just not pretending it takes place in the 30's when it takes place in the 50's.
This could be a whole essay in itself...but the 50's were a time of mounting Communist paranoia as the Cold War really got going. This is reflected in the B-movies of the time. Radioactive monsters are just a manifestation of the Soviets invading. It can be argued that the UFO phenomenon of the 50's (in real life, not only the movies) was also some manifestation of Cold War paranoia.
So in this new Indy, we have the classic MacGuffin -- the skulls -- and we also have new elements, presumably aliens. And the Soviets are the villains. There's also been an unconfirmed rumor that we'll see a nuclear explosion, possibly in the opening sequence. Without tying it together neatly, you can see this all fits with the above theories. I don't think the movie will be especially allegorical, but as Lucas says, the Indy movies stay just this side of plausibility. And this all seems like a very plausible backdrop to an Indiana Jones adventure, IMO.
I see no reason to worry; it's all a realistic expression of the 50's, both in the real world and in the B-movies of that time. And after reading the interviews I'm even more sure that it will be handled very well.