I like the look of the trailers.
Will it beat the original? Probably not.
Still, Michael Bay can't actually ruin your childhood.
Even if it isn't going to a ｐｅｒｆｅｃｔ port of the source material, there's no shame in looking forward to it. I certainly am. They've nailed the visual style, and the soundtrack seems to pay serious homage to the original. It would stink if they end up watering down the actual theme of the animated film, but then the worst you'll get is a visually stunning action movie.
Slightly hypocritical rant
Either way, being crazy cynical about something that's just now getting trailers isn't actually going to benefit you in any way shape or form. I don't mean to get on the soap box here, but really the alternative is there just not being a movie whatsoever. If it doesn't turn out well that'd be a bummer, but with the potential to be something really neat there's no reason to fret about it not accomplishing that. From what I've seen it might be really cool- there's no point in dismissing it off the bat, nor in whining about how it might not be the best thing since sliced bread.