The first game is one of my favourites. The only game I ever played to 100%. IMO it perfected Arkham combat and Ass Creed parkour/assasinstions. The Nemesis system was brilliant.
This new game looks awesome but I'm a little fearfully they brought in too much pointless Assasins Creed ish basebuilding / forces missions / collectibles hunting. Basically, adding inconsequential (and, in the case of ass creed, usually annoying) game play features.
We'll see soon enough. Release date is August.