I am replaying Arkham Asylum to better inform my opinion that the trilogy sucks and Batman deserves better.
Batman has a second bat cave under Arkham Asylum. He tells Oracle that he built it for just this kind of emergency. The cave is huge. As big as his main cave should be. First I have to ask how common these caves are, that he can just FIND one at his convenience. The cave under his mansion makes sense because without the bats that had such an impression on him he would not have chosen them as his symbol. But this second cave... No, it's far too convenient, so I have to conclude that he tore the earth apart, solid bedrock, without Arkham Asylum hearing the massive explosions and drilling. If the developers wanted so badly to feature the bat cave for that precious fanservice, but found themselves in this conundrum of HOW when the asylum is so far away, all they had to do was make it a flashback. Hell, they could have given us the whole mansion in that flashback as well, not entirely unlike fooling around and learning the mechanics in Lara Croft's home. Would have been cozy.
The design of the asylum, likewise, relishes in excess. The floor plan is so weird and many of the rooms so huge (with too many bland hallways in between) that it doesn't even look like a prison or asylum, supporting my point that each of these games with too many villains to tell an interesting story would have worked better as loosely connected episodes. A smaller asylum for a shorter story.