NEW YORK – If New York City bans big sodas, what's next on the list? Large slices of pizza? Double-scoop ice cream cones? Tubs of movie-theater popcorn? The 16-ounce strip steak?

The proposed crackdown on super-sized drinks could face a legal challenge from those who oppose the first-in-the-nation rule and fear the city isn't going to stop with beverages.

Mayor Michael Bloomberg wants to bar restaurants, movie theaters, sports arenas, food carts and delis from selling sodas and other sugary drinks in servings larger than 16 ounces, saying it is a way to fight obesity in a city that spends billions of dollars a year on weight-related health problems.