What new character classes, weapons, and powers are availible in the resurgence pack DLC?
What level of rarity are they? How can I find them?
All of the items debuting in the Resurgance Packs are Gold-level rarity with the exception of the new consumables (which, like the other consumables, have common rarity). They can be found in regular Spectre / Veterans packs, or in the limited-time Reserves Pack (which guarantees one of these, available from the upcoming Operation: Resurgance).
Questions about the differences between the races should be directed here.
Asari Justicar Adept
Krogan Battlemaster Vanguard
Sniper Rifle - Kishock Harpoon Gun
SMG - Geth Plasma SMG
Assault Rifle - Striker
The pack also included two new maps: Firebase: Hydra and Firebase: Condor.