Léo Ho Tep;28479095 said:

A batman movie
could be light hearted without being camp and
still be loved by the audience. It needs to play with the sense of adventures, the gadgets, and the whole "batman is cool even without powers" stuff, just like the first volume of Batman Inc.
Because one movie didn't work doesn't mean it can't be done right.
We don't know that.
7 Batman movies have been out since 1989.
And what is shown is, is that 5 of the darkest are better received movies. Returns had one fault that caused things to turn light hearted.
Forever wasn't a bad film at all. But it was still silly. Luckily, however, it had redeeming qualities in the shape of dramatic scenes between characters.
The music was light hearted in nature, the villains were more or less light hearted, bordering on campy...would've been a way better experience had they been a little more serious and darker, especially Jones.
Forever did make more money than Returns.
But it wasn't more loved by fans and critics than Returns. That movie did go too far, resulting in parents not taking their kids to go see it.
Batman should never be like Marvel's work - lighter hearted. Because it's not in the nature of the context of things.
He lives in a world of psychopaths. Batman isn't a well minded character. Characters in those stories are tragic and dramatic.
To make things just the slightest touch of light heart, it immediately loses all the dramatic weight that's very important to the Batman world. And when that happens, it turns people off. People know by now, Batman isn't meant to be light hearted.
It will always come off as campy in the minds of those who know of the old show and B&R.
It'll never escape that fate and WB could never afford to run that risk.