mmmmmmm breaths heavily
From ZENtertainment:
The rumors about Sam Rockwell and Christian Bale being offered the part of Carnage reported some months ago for Spider-Man 3 are bogus. Here is the truth: Jake Gyllenhall will make a brief appearance as Kletus Kasady in the Amazing spider’Man and will don the CGI symbiote alongside Venom in Spider-Man 3.
This is still just a rumor, but it would be an interesting choice, considering the extreme visual similarities between Jake and Tobey.