Spielberg directed and produced the epic, Amistad (1997), a spectacular film that was shorted at the Oscars and in release due to the fact that its release date was moved around so much in late 1997.
Spielberg is a great filmmaker without a doubt, and it does not seem he is anywhere near done making films, and with all of the money he has he probably could do anything he wanted to.
It was directed by Steven Spielberg from a script by Josh Friedman and David Koepp and stars Tom Cruise, Dakota Fanning, and Justin Chatwin.
Also, the plot device that the aliens had been to Earth before and left behind their tripods is similar to a revelation in the TV series in which a tripod (an "older model" of the war machines in the 1953 film) is unearthed, having been left behind for hundreds to thousands of years.
At the world premiere in Tokyo, Spielberg said, "Well, certainly the first tripod was taken down in Osaka, because Osaka has so much experience with Gamera and Godzilla." This explains why tripods appear from under earth after a million years of hibernation, why they are as tall as Godzilla, and why they roar.