Ant Man movie

A movie coming soon about another comic book character and this one is "Ant Man":

http://social.entertainment.msn.com/mov ... release-up

Very interesting regarding Ant Man's ties to the character known as Ultron, especially since that character is supposedly going to be featured in the upcoming "Avengers 2" movie.

Anyone here have any knowledge of this Ant Man comic book character? Is he a good guy or a bad guy or a mixture of both?

Update on this film:

http://movies.yahoo.com/blogs/movie-new ... 26333.html

I still can't believe they're actually making an Ant Man movie. In comics, he's been regulated to usage as a background character for so long that it doesn't make sense. He's one of the founders of the Avengers, but once they skipped him for that movie, I was sure they wouldn't try a full film for this character.