Aah, the '70s. The age of energy crisis, political turmoil ... and disaster movies. With Wolfgang Petersen's Poseidon set to make a big splash on movie screens next week, it might be time to look at the top disaster flicks of the '70s ... and start making bets on which will be the next one to be remade. These films had cutting-edge effects, top casts and high-power studio screenwriting and production behind them ... by the standards of the day, anyhow. Time has not been kind to many of these films, and some of them now work far better as cultural artifacts than as actual movies. But at heart, they all have a certain something -- hard-core premises, ambition and the kind of casting you'd get if you put your finger down at random in the Beverly Hills phone book.