Batman usually cracks his knuckles to show that he's deadly serious. He does it in other media as well.
Batman The Animated Series Episode 32 - Robin's Reckoning, Part I
JLA #3 - War of the Worlds
Purely for the record, cracking your knuckles helps with joint looseness and may help to prevent injury to your hands during a fight.
What is commonly identified with the term Batcave is the cave below Wayne Manor, but in reality Batcave is the name of a complex of different caves/areas placed all around (well, below, actually) Gotham City. The one below Arkham Asylum is just one if many of those areas, it's called "Northwest Batcave" and first appearance I can remember of it is in No Man'...
I will presume you are talking about the real world when you ask, so I will say, using the method that Batman does in the game, by turning his cape into a makeshift and temporary glider, the answer would be NOT YET.
The technology for such a thing may actually exist in the near-future by using materials called memory plastics or shape-memory polymers. ...
As per Paul's comment above, the symbol on the character's foot appears to be a stylised version of the Sheikah Symbol repeatedly used in the Zelda game series.
Adding weight to this theory is an interview given by Sefton Hill (Game Director for "Batman : Arkham Asylum") in which he describes his key influences as being Metroid and Zelda.
There are ...
Arkham City is a completely different timeline than the current DCnU. It also does not fall within the canon Post-Crisis worlds established including Zero Hour or Flashpoint. It is a completely separate timeline from any active DC Universe. This does not mean it could not be assigned to one of the 52 universes currently available to the DCnU.
Paul Dini, a ...
Ra's Al Ghul is an insane criminal mastermind, willing to do whatever it takes to win the day, up to and including killing himself to get to you.
But he has an ace in the hole. He will likely not stay dead thanks to the efforts of his ley-lined powered, magically life-sustaining and even resurrecting technology of the Lazarus Pit.
Lazarus Pits were ...
The Arkham Asylum games are not plucked from the DC Continuity and are at best a pocket universe version of those characters. With that said, it is difficult to know exactly what Batman does and does not know in the overall scope of the game.
In the Pre-New 52 DCU continuity:
Batman knews OF the Lazarus Pit, and he knows that it can return the recently ...
At this point in Batman: Arkham City, the mayor of Gotham is Quincy Sharp. Sharp was manipulated by Hugo Strange, the current warden of Arkham City, who helped him win the election. In exchange, Sharp basically allowed Strange to do whatever he wanted, helped by a generous amount of mind control. As seen here:
SHARP: Strange came to me back at the ...
There's no mention of her undergoing any form of "enhancement" or "augmentation" to increase her physical abilities in any of the Arkham games to the best of my knowledge.
Her strength and dexterity is attributed to her past as a gymnast rather than any form of superhuman ability (and peak human physiology is way higher than real-world analogues in all ...
TL;DR: For a man with his skills & charisma, obtaining followers or resources would be quite easy.
Although their exact origin is unknown, the Arkham Knight Militia would appear to be a pre-existing mercenary unit that ended up working for The Arkham Knight.
We know that
It's safe to assume that he found the mercenaries at this time and convinced ...
You can do it, but you need a much bigger wing surface; think hang glider or ram-air parachute to get the proper scale. I think the Batman Begins movie poster comes closest to getting the scale right but I think even that wing is still too small.
The tank is a reused asset and (as you mentioned) the whole encounter is essentially the same.
I guess nobody is able to tell the absolute truth behind this, but I simply guess they just ran out of time.
As far as I'm aware there is no real in-lore explanation for this, especially considering it didn't sound typical for Deathstroke (as far as I know the ...
Christopher Nolan's Batman also has this ability.
If they use the same "technology" to achieve this then, as explained in Batman Begins the cape is made of a Memory Cloth which uses electrical charges within the material to make it rigid enough to glide and fly.
From this timeline (some of the reasoning is described on that site, not quoted here for brevity)
Batman - Arkham Origins: Initiation
Batman - Arkham Origins #1-8
24 - 25
Batman: Arkham Origins
Batman: Arkham Origins: Cold, Cold Heart
Simplest in-universe explanation is that it's just an extra tank that the militia had. Deathstroke apparently had a deal with the Arkham Knight and/or Scarecrow to take over leadership should anything happen to the Arkham Knight, so he would have had access to whatever equipment the militia had. Since Deathstroke would have known that Batman was actively ...