"Epic" is epic. Despite what it currently says when you look at this movie on here, I think that it does live up to your expectations. You should see this movie if you like animated movies. If not, that's probably fine too.
I wrote that this has "sex" in it, because it has a kiss at the end, like all animated fairy tale like things. It's really not bad. I guess just if you/your kids are at that age where they are GENUINELY yelling or thinking "EWWW!" every time they see someone kiss on screen, in real life, whatever.
Pretty much everyone in the movie except for the villains are positive role models. The leafmen are very brave, much like soldiers, and kind. They won't leave a man behind. The queen is very kind, powerful, and good humored. The main character is kind (Even though one of her ears has three piercings), environmental, and funny. Her dad is also VERY environmental, caring, and kind. The only thing I would warn about this movie is if you or your child is really young and possibly scared of dogs. The dog in this movie has three legs and one eye, and that might scare some young kids.
The positive message is to be kind to the environment. Don't kill bugs, tear leaves, etc. That's the educational part, too.
So I suggest going to see epic. If your relatively older, like maybe a pre-teen and up, this movie is entertaining, and has some pretty good actors in it. And singers. There's Beyoncé, Pit Bull, Josh Hutcherson, Amanda Seyfried, etc. It's really good! GO SEE IT!