No one knows about the new jobs besides Red Mage yet. There are three strong contenders: Samurai, Blue Mage, and Dancer. The only hint we have is a Spiderman shirt (Yoshi P always wears a comic book super hero shirt to hint at the new classes, like Scarlet Witch for Red Mage, or Batman for Dark Knight). As there are theoretically two positions left to fill for jobs, my personal guess is Blue Mage and Samurai, but we'll see.