The newest update adds an entirely new tier to the Gunslinger card. Once you've got a high-level Salloon and enough Notorious Gunslingers, Goods, and Gold, you'll be able to combine those four Notorious cards to make a Legendary Gunslinger - with even more ridiculous amounts of firepower and health. The kicker is that he's still only going to cost a single Battle Point to use in combat.
You can check out the new Legendary Gunslinger now, and you just know the other characters will be getting the Legendary treatment in the future. If you still need to grab Compass Point:West, it's available on the App Store for free.