Assassin's Creed 2 was supposed to cover Brotherhood's entire plot, but that was "way too ambitious to deliver properly" in just one game

Even after all these years, Assassin's Creed: Brotherhood is arguably still the peak of the series. After Assassin's Creed 2 sanded off the clunky edges of the original game, Brotherhood offered a natural continuation of Ezio's story and expanded gameplay elements tied to his increasing leadership o…