FBTB Fan Anonymous Tipster sent me the above and below images from Brickipedia (here and here) showing in detail 76003 Superman: Battle of Smallville. Five minifigs, no idea of piece count, but I'm going to take a guess that it'll cost you about $40 bucks, the same as the Iron Man 3 set, 76007 Iron Man: Malibu Mansion Attack, since they both have the same number of minifigs and are comparable in size.
Amazon.co.uk has the set listed for preorder. Price is £39.99 with free delivery inside the UK. They also have 76002 Superman: Metropolis Showdown listed for £11.99.
Argos has the two sets listed on their site for reservations. No stores seem to show any stock levels however.
- 76003 Superman: Battle of Smallville - €50.99 Argos UK
- 76002 Superman: Metropolis Showdown - €14.99 Argos UK