In the screen shots from 2.0 you notice a chocobo in party with the others as a member of the party. I think its called the "buddy system" right now. Dragoon will not be a pet class, but they may be able to have a dragon buddy that nobody else has access too. I started a thread about this and i think in the first 10 post someone posted the information from the dev team on how the pet system works check it out.

http://forum.square-enix.com/ffxiv/t...highlight=pets