Title says it all no mention of new spells, though i dont remember them talking about spells in dawnguard and we still got a few so theres always hope i suppose

Become the Ultimate Dragonborn - Harness the power of the Voice as you face off against the first Dragonborn. Wield new shouts and spells including Dragon Aspect – allowing you to summon the inner power of a dragon to deliver colossal blows and strengthen other shouts.

Why would you assume anything at this point? There's hasn't been much new info, but that doesn't mean there isn't any at all.

this