Batman:Arkham assylum sequals

the titan plot was just part of a bigger plot that involves gotham city and the world

game
2
Batman: Gotham city
-fight foes you did not fight in Arkham
-use all of batman's vehicles and gadgets (create your own)
-learn the history of Gotham
-discover hidden passages that batman uses

fight
-firefly in the air
-catwoman on the rooftops
-new bane and his army
-soloman Grundy
-the pinguin and his birds
-bank robbers
-gangs/thugs
-criminals

go through the riddlers labyrinth of riddles

explore
-all of gotham
-wayne mantion and batcave
-gotham sewers

call for bat:
-boat
-jet
-mobile
any where any time

swim underwater
blend in with the shadows
use smoke bombs
batarange laso

3
Batman: world
-ras al ghoul/ poison ivy and Mr.freez team up to change the world, they claim to be saving it

-different environment batsuites (arctic snow/steemy jungles/hot desserts)

fight
-plant monsters
-polar bears and eskimo henchmen
-ghoul henchmen
-scarface (brought to life with the help of poison ivy)