Why does the animation look corny?

This looks pretty juvenile. But hey, it's obviously whatvthey were going for.

-- Sent from my 13 year old P.O.S. Desktop®

It's probably an effort to let people watching know that it isn't an extension of the original Justice League series.

When there's no more room in Hollywood, remakes shall walk the Earth.

The old "Timmverse" of Batman, Superman and Justice League was NOT "realistic" looking at all. People liked the more serious story telling so they came to view the animation style as more serious, even with the distinct retro character builds, particular the producers' fondness for hour-glass figured females that felt like they jumped out of a paper doll book from the 50's.

I don't know where, but I saw some comics called Action Comic, and the style of the art was similar to this. I forget where, but I think it's a specific art style. Don't quote me on it.

I agree, that's why i'm not even bothering with it.

They want to make it as 'kiddie' as possible so children (to be fair, their main demographic) go out buy the toys.