The Avengers pretty much are the same here as they are in the Mainstream Marvel Universe.  At least for now.  The major difference between th Avengers you know and the Avengers you are about to meet is that the Avengers have formed a soveriegn nation here.

This is a trend in Marvel Comics lately, where metahuman minorities are forming their own nations, Krakoa and the Vampire Nation being just two examples.  The Avengers Nation (I'm looking for another name) is just continuing the trend.

The Avengers Nation currently claims the Isle of Demons as their homeland.  The Isle of Demons is fictional in our world, very real in our Marvelous Earth.  There are a lot of real-world legends about this phantom island which might be very real in Earth-682.

Wikipedia entry on Isle of Demons

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