FFXIV was all but announced already, it fact it even was officially announced under it's working title (Project Requiem). The only reason it isn't official yet is because Microsoft and SE are working out the pricing structure (MS likely wants a Gold requirement, SE is likely pushing for Silver like FFIX).
I think Versus will likely end up going multi too, though not day-and-date like FFXIII (and probably FFXIV). 360 will get it a year later, like Star Ocean PS3.