I am looking for a controller that works with Arduino (i.e. there is official or third-party support for the controller in the Arduino IDE and core libs) and has both built-in CAN and I2C buses. I was looking at the ATMega automotive series (16M1, 32M1, 64M1, 32C1, 64C1) but it does not mention I2C/TWI in the datasheet at all.
(I know I can bitbang I2C, I know there is MCP2515 for CAN over SPI.)
EDIT: The application in mind is a bridge between a few I2C sensors and CAN, no complex logic. High performance is not necessary, plus it will drive costs upwards.