Release schedule for the rest of the year.
May: High Elves
September: Blood Bowl
October: Space Marines
I had Dwarves a lot sooner than others, so its probably safe to leave a question mark. It could possibly be brettonians or wood elves. Im basing my prediction of Dwarves on where I recall them being design wise, which was right after lizardmen.
I've had multiple confirmations of space marines being the last 40k codex of 2013 and Tyranids being the first codex of 2014.
October is a Black Box release, blood bowl and Warhammer quest have come up, although...it could be something surprisingly different...
When Hastings weighs in, I'd go with his schedule always