According to the Encarta Dictionary: English (North America), realistic is defined as simulating real things or imaginary things in a way that seems real. I agree with that definition because I know how hyped a fan can be when he thinks about worlds where wizards and superheroes can be credibly depicted on television or a movie screen or even, technology willing, in our drably ordinary world one day. Nothing wrong with using realistic, just again its overused when words like truthful, accurate, authentic can be used just as easily. Realistic though is a tricky expression to use when it deals with fantasy or sci-fi especially in superhero discussions when one characters powers are described as being more realistic than anothers. Cmon, man. The Incredible Hulk is more realistic than Superman because one gets his strength because of rage while the other from the sun? Better words for a debate like that would be plausible or even appealing because thats what a pissing contest between fans of a fictional character comes down to; how much you like him not how he would fit into the quote unquote real world.