While it hasn't confirmed any concrete plans to do so, Sony would at least entertain the idea of bundling the PlayStation Vita together with the PlayStation 3. Sony would "have nothing against [a bundle] whatsoever," Fergal Gara, managing director of PlayStation UK recently told CVG. Fergal added that it could conceivably happen as early as this Christmas, if Sony wanted.
Such a bundle would be a natural candidate for games that feature crossplay functionality, he said, and could also include PlayStation Plus, which now functions across both devices. With Sony trying very hard to push the interconnectivity between Vita and PS3, a bundle would certainly make sense, and it sounds like Sony (at least in the UK) isn't opposed to the idea.
Should the concept come to fruition, the only question is whether or not consumers feel the same way.