For a while, Spider-Man fans have known that Electro is not the only villain featured in The Amazing Spider-Man 2. The upcoming sequel also features The Rhino, who will be played by Paul Giamatti. From what has been shown on the character, it looks as though Giamatti's role is not a big one; however, there might more of Giamatti after the second installment.
"I think I'm only doing the next movie, I don't think I'm in the next-next movie,"
If Rhino does return in the third film, it could mean that character might be expanded upon or that the filmmakers are planning for the Sinister Six to appear in the film series. It all up to debate for the time being.
The Amazing Spider-Man 2 hits theaters May 2,2014; while The Amazing Spider-Man 3 is scheduled to be released on June 10,2016.