Bane/Arkham Origins, The Joker/Arkham Origins, The Arkham Knight, Batman/Arkham Knight, and Harley Quinn/Arkham Knight cannot be obtained from this pack - only from the Arkham Pack, despite the pack's image featuring Batman/Arkham Knight.
At a cost of $39.99, it is the second most expensive pack in the store after the Worst Heroes Ever Bundle. It is also not cost effective, while most other packs are vastly cheaper than the characters they offer. However, the value of this pack lies in the difficulty of unlocking Harley Quinn/Arkham from the console game, as well as the difficulty of obtaining Deathstroke/Arkham Origins if his challenge was missed; players would be required to expend a substantial amount of credits on Challenge Booster Packs otherwise.
While the Arkham Asylum Pack 2 team is indeed very strong, note that it costs $39.99, which is not worth the price. The Red Son Pack, however is currently a better alternative that is much less complicated for new players to get; for players on a budget, characters from the Red Son Pack can be upgraded to much higher stats for Power Credits.