Forever changes
Arcane Blast, Ice Lance, Frostfire Bolt (reported baseline); Hot Streak (reduces Pyroblast cast, not instant), Fingers of Frost, Missile Barrage, Arcane Impact/Geometry/Shielding, Wake of Fire, Incineration; Shatter to 3 pts; Winter's Chill limited to Frostbolt/Ice Lance. Orc Mage and Alliance Skyborne Mage new.
Confidence note
Reported (single credible outlet, BlizzCon demo build; subject to beta change)