Often, the omegas in a real wolf pack are the ones who take care of pack morale. While they're at the bottom of the totem pole, being the last to eat and the first one to be dominated by other pack members, they're also often the ones who initiate play activities and will be the baby sitter while the pack is out on the hunt. They're also the wolves most likely to be forced out of the pack, and therefore also the most likely to start their own wolf packs where they get to be the alphas. I'm not sure whether they meant to or not, but it sounds like the makers of the film weren't that far off from real wolfpack group dynamics.
Doesn't make this movie sound like it sucks any less, of course, but I thought that was a little interesting.