If Ertai's Meddling is used to copy a spell being cast face down due to Morph ability, the spell will create a face up, 2/2, colorless, nameless creature with no text. This may be a little counter-intuitive, because you might expect the card to enter face down like it would have when originally cast, but Ertai's Meddling copies only the original spell and not the entire card the spell represented.