Just found it a couple days back so i guess we will see the next DLC quiet fast arriving.

Xbox360achievements.org is the site where they can be found.

http://www.xbox360achievements.org/game/kingdoms-of-amalur-reckoning/achievements/

We can find 6 new achievements for 150 points below but no real name to be found there under the name Untitled DLC2.

Still nothing too be found on the Kingdoms of Amalur Reckoning site we can only hope it does have alot of content like The Legend of Dead Kel.