We've already racked our brains for everything we know about Resident Evil 6's mysterious Mercenary, but Capcom's just revealed that the enigmatic probably-Wesker won't be the game's only gun-for-hire. The other Mercenary... IS YOU, in that the company's confirmed the return of score-attack Mercenaries mode for the upcoming sequel. And in that you're being asked to choose your loyalty based on who's offering the best deal, that being kind of what a mercenary does to pay the rent.
Depending on where you place your preorder, Capcom's got one of three exclusive bonus maps for the Mercenaries mode, which you can see in their spooky potentially-haunted emptiness in the gallery above. Amazon preorders will get the High Seas Fortress map, possibly because Amazon is all about “shipping” things to people; GameStop customers get the Catacombs, whose confounding array of booby-traps sort of mirror GameStop trade-in practices, slammed this week in a CA court; early adopters at Best Buy get the Railyard, which you will be relieved to hear doesn't relate to Best Buy in any way that we can see.
The game's due on October 2nd, which gives you some five months of agonizing back-and-forth indecision – or ten minutes of saying, “meh, I'm sure the others will be downloadable later down the line,” and five months of assuring yourself that sure, that's probably what “exclusive” means in this context.