Read: Free DLC
THQ plans to buy your loyalty with a nifty pre-order perk for Darksiders II. If you buy early, you'll receive he Limited Edition free of charge - which essentially is the standard retail edition along with a unique code allowing the you to download Argul's Tomb: the game's first single-player downloadable content pack. I suppose "pretty much the same but with free DLC edition" doesn't have the same ring as "limited."
Note that you'll also get a pre-order bonus depending on which retailer you order from. More details here.
A $99 Darksiders II Collectors Edition has been unveiled, which includes a life-sized replica Death Mask with display stand, a unique Shadow of Death armor and scythe set with enhanced stats, a digital copy of the Darksiders II sound-track and a hard-cover Darksiders II art book. UK retail partners haven't been announced yet, but we'll keep you posted.