Marc Webb, director of The Amazing Spider-Man 2 is very active on the social media site. And he has posted a picture of Paul Giamatti, playing Aleksei Sytsevich; who eventually becomes Rhino! This guy looks mean! Coupled with another villain, Electro played by Jaime Foxx, Spider-Man's got his work cut out for him.
Also in the film is Dane Dehaan who plays Harry Osborn. The Marc Webb franchise is definitely bringing in new characters from the Spider-Man universe, and I love that. I hate when rebooted franchises use the same characters as its predecessor. I'm pretty happy with the sneak peaks I've seen. Hope the film builds on that.