Played this game from start to finish more times than I'd like to mention. I cried during the first playthrough and started to feel numb through the 7th or 8th.

Combat is great, I love mix and matching different gadgets to extend my combo or making the fights more efficient. Mr. Negative is a weak ass villain, they could've sold me the game without him, but they did Doc Ock great.
Stealth could use some work, its too easy, the AI is retarded, but if one of them catch you, everyone instantly knows where you are. They all have a hive mind. Conversely, in Arkham Knight, if a goon catches you, you have a few seconds to take him down before he alerts the others.
Can't wait to see how they improve the system in the next game.