Its not the sequel that you deserved, but the sequel that you needed.
Summary: Keeps the same great controls of Arkham Asylum, but in a new open environment world with more bad guys and more mayheim.
Gameplay: Same controls as before, with more gadets, more fight moves and improved flight mechanics. Great intuitive controls.
Sound: Batman and Joker are voice by the same actors from the 90s Animated Batman show, of Kevin Conroy and Mark Hamil. Great job once again byt the two. Also great orchestra music as the tension rises in the game.
Story: Not as good as the first, but story gives you a reason to fight a larger amount of villains from the batman universe, with a climactic ending that will leave you thinking, where the franchise will go next.
Overall: Game has more challenge maps then before, more moves, more gadgets and a larger city, it improved on previous titles and made it longer. Great sequel to a great game.