The next job /class will be

[coldreactive]

next class/job will be rogue/ninja :P

That's "this coming" job/class :P

Yoshida said the next jobs, coming in the expansion, will be healers / tanks. He also stated that Musketeer is a job that requires "MRD" and is not what players are expecting. The developers of FFXIV also stated numerous times that the game will be different through and through from FFXI.