Ignore the douchebag commentator.
This is from E3, but I didn't around to watching it until now. Skip to 2:15 for gameplay.
So according to interviews, an open world will be attempted with this game, specifically ALL OF MIDDLE EARTH. That's what the people said, so obviously some sort of miniature compressed version of the realm will be included, since LEGO Batman 2 had an open world Gotham City.
Each character will have special skills, like Frodo becoming invisible with the ring, Gimli with his strength, Legolas and his agility, etc...
Another cool feature is the up gradable weapons. Each character has an inventory for up to eight weapons, which can be unlocked, in the same way the characters in the movies got them.
Whatever, this looks amazing, so I'm going to go freeze myself util October when it comes out.