She's on the run from Norman Obsorn, the Avengers are on the run from Norman Osborn, she's a cool character who has a lot of inside info on Osborn, she has cool powers and the current New Avengers are a bit shy, power-wise (with the current exception of Ms. Marvel).

It totally works!!

And I won't even mention the whole "Avengers Forever said she'd be an Avenger in the future" thing, I promise!