Keep in mind that this could all turn out to be a bust, but given Yoshi-P's statement that caster/scout type classes would be a priority in the Live Letter, it might be true.
The following image has surfaced, purporting to be the result of datamining of the beta client:
It seems corroborated by a number of other files and images which have apparently been mined, such as the following:
Only time will tell whether this is legit or not, and it's presence in the source code is not necessarily evidence of implementation. There were a number of classes identified via data mines of the first version (arcanist, musketeer, fencer, and shepherd among them, if I remember correctly) that never saw the light of day. But given that arcanist wields grimoires as their weapon, I would not be surprised to see scholar as the eventual second job associated with that class.
(This mines are apparently coming through as a result of people at FFXIV Pads. I'm poking around to see if I can find the originator. Mines are common, so I'm not willing to discount it offhand given that the beta client just became widely accessible, and this does tend to be how we find these things out.)