[Snowflakian]

Answers to the rumors:

We will see another Iron Man & Spider_Man, although not the ones you'd expect.
Iron Spidey, Iron Patriot, and the two iron man target two packs.

One team will be completed, while another team will get its first member
The Wreckers completed, New team could be dark avengers, Four Horsemen of apocalypse, Pet Avengers (Ms. Lyon who comes with Mary Jane, and lockheed with Kitty Pryde).

Two characters from the first year will get new versions.
Iron Spider, Tiger Stripe Wolverine, Dark Wolverine, Dark Spider-man, Iron Patriot, Dark Ms. Marvel. Sentry spidey comic pack two pack. Black Panther, and punisher. (As mentioned by posters below.)

We will see a great mix of exclusives coming this summer...from very different sources.
Target Eclusives, who didn't get MU exclusives previously.

There will be at least one character that no one could have predicted. (but feel free to guess!)
Thanos, Dark Ms. Marvel

Finally, we will see a new Captain!
Ultimate Captain America 1942 SDCC figure

So Far this seems to be the answers unless they show more later.