I actually think they got three good movies out of this character and concept. Though only one of them was truly great.
This could be good. It's the only period of Lecter's life that hasn't been explored, in print or on screen. And it was the most active period of his career, so to speak. If they handle it well, it would be interesting to watch their two stories intertwine.
Or, it could be really bad. Either way, I'd be willing to give it a try.