Unauthorized. Under the Inversion spell, Doctor Doom founded his own team of Avengers in Avengers World #15-16. It's quite unlikely they were recognized as an official extension of the roster.
Elsa Bloodstone has received two distinct pasts. She was introduced as completely unaware of her father's unique abilities and past as a monster hunter, having been raised separately by her mother and learning about Ulysses Bloodstone after his death. Her current origin is having been raised since birth as a monster hunter by her father. Captain America and the Mighty Avengers strongly implied Elsa, Monica Rambeau, and others from the NextWave team had their history messed with by the Beyond Corporation during the aforementioned team's title.