With the mention ofMagitek job stones, the Populares being discredited and potentially driven out of Garlemald, and the possible Garlean focus next expansion, I think we could get two Magitek based jobs.
A Chemist, or Chemist-like, healer job could certainly fit.
The other job, if we even get two, would definitely be a DPS. Given the flexibility of magitek, it could theoretically be just about anything and fit any of the 3 DPS sub-types.