Lepin outs the 501pcs Marvel set as their own.
As you can see, the Dock Ock thing is a mech that is piloted by Otto Octavius himself, aka Doctor Octopus. Personally, I don't find this set too interesting. The minifigs are really the biggest reasons for getting this set.
So a couple of minifigs, a big Doc Ock mech, and a police speed boat are included in the set.
The minifigs included are interesting enough, except POGO and XINH have released most of them already. All of them, except the Captain Stacy one. Loving the web surf board though that Spider-Man is on!