According to toy news site ToyArk.com, MARVEL Minimates Wave 56 will be dedicated to SONY's "Amazing Spider-Man 2." Here is the official quote:
"Marvel Minimates Series 56: Amazing Spider-Man 2 Asst.
The most eagerly anticipated sequel of the year is getting a sequel set of Minimates! This assortment will include four two-packs, including Battle-Damaged Spider-Man with Electro, Spider-Man with Norman Osborn, Graduation Peter with Gwen Stacy and a rare, one-per-case set featuring Alistair Smythe with Aleksei Sytsevich! Each Minimate mini-figure stands 2 inches tall, with 14 points of articulation and a variety of interchangeable parts and accessories. Designed and Sculpted by Art Asylum! (Item #JAN141927, SRP: $9.99ea.)"
Notice the rare, one-per-case item: Alistar Smythe and Aleksei Sytsevich. As many fans of the comics and 90's cartoon know, Smythe is the creator of the Spider-Slayers. Many have said that the Rhino's mechanical suit resembles a Spider-Slayer, so maybe it's not a coincidence that those two are paired together.
Do we have another member of the Sinister Six, or just the person who makes their armory?
For more on those and Walking Dead Minimates, along with other things, here's the full link
http://news.toyark.com/2013/12/13/new-walking-dead-robin-star-wars-marvel-select-dst-109766