ARM revealed details about its 2012 processor roadmap, which is filled with codenames with a gods and giants theme. You can read all the details at EE Times.
The codenames for the next-generation graphics cores are Skrymir and Tyr. Skyrmir is a giant in Norse mythology and Tyr was a god of war and single combat and whose day is Tuesday. ARM paired these two cores together in a presentation given to analysts as it presented its financial results for 4Q11.
This might suggest that Skyrmir/Tyr will be the means by which ARM will deliver its big-little processing approach in the graphics domain.