The PlayStation 3 version of Final Fantasy X HD will pack Final Fantasy X-2 on the same disc, according to Japanese magazine Jump (via Gematsu). The fashion-swapping, pop-singing direct sequel will be sold separately on PS Vita in Japan.
The visually remastered games will both include their respective International Edition content, and you can get a quick look at the smooth new forms of Tidus and Yuna in this short video clip--smooth as in high-poly and nice textures, not smooth as in lacking body hair. Though that is, of course, also still true.
While the Vita versions will be sold a la carte in Japan, we'd be surprised if some kind of package deal didn't emerge for their Western release.