Lucario Guy, I understood it differently.
If I'm getting it right, it means this:
Beast Landorus: Intimidate / Sheer Force
Beast Tornadus: Regenerator / Defiant
Beast Thundurus: Volt Absorb / Defiant
Landorus: Sand Force / Sheer Force
Tornadus: Prankster / Defiant
Thundurus: Prankster / Defiant
On the plus side, this means that all of the DW abilities are now available. Special Landorus will be a fun, Nidoking-esque gimmick. Oh, and Defiant Tornadus is sure to be neat.
EDIT: Damn, double ninja'd.
VGC Regionals: VGC11 Top 16, VGC12 12th Place