The next Harry Potter game is a darker third-person magic-shooter with a cover system. No chainsaws in this game. But it sounds like even the people making Harry Potter and the Deathly Hallows Part 1 sense an overstep here.
As Brian Crecente reported in his positive June impressions of Deathly Hallows, the video game based on J.K. Rowling's final Potter book and fall movie covering the first half of that novel is not the cheerful kid-friendly stuff of the first Potter adventures. The developers at EA are going for a T rating, with grit.