Easy? Absolutely. Inexpensive? Not a chance. But yes, very easy. You would only need Bradley Cooper for the voice, which gives you tremendous leeway in terms of scheduling. Animation and such can proceed completely independent of that.
That said, there's still no way it's happening. But the more I think about it, the more and more I'm hoping for Howard. They already have a voice actor, from Guardians V2. They already have an animation model, from the same source. He's a character that's unlikely to be used outside of cameos for anything else. And it would be hilarious. Something so outside the everyday that even SHIELD agents would lose it. A talking duck. In a suit!
Seriously Marvel. Howard for SHIELD. Howard forever.