GCSE Music: Section BWatch
2011: Chopin & Buckley
2012: Bernstein & Koko
2013: Mozart & Moby
I'd assume that 2014 will therefore be from Areas of Study 2 and 4.
This leaves Reich, Schoenberg, Rag Desh and Capercaillie.
I reckon it's Schoenberg and Capercaillie (Capercaillie hasn't come up in any practice materials like the SAMs or the 3 practice papers).
Obviously, prepare for everything – we're not 100% certain, are we?