Back when Avengers came out, there were related LEGO sets released. I picked up as few as possible to get all of the Avengers minifigs. With Avengers: Age of Ultron out, LEGO's released a bunch of new LEGO sets related to the new film. However, they split up the characters across various sets, so there's no trivial way to buy the entire team. I'd like to pick up the fewest number of sets to get the minifigs for the new Avengers. Based on the trailers, that means 3 characters: Scarlet Witch, Quicksilver, and Vision.
What's the fewest number of LEGO sets I need to purchase to get the new Avengers minifigs?