User blog comment:Blinkn/Return of Vision/@comment-4652104-20111213101447

I rather suspect that the newly rebuilt old Vision is not the Vision, but Ultron in disguise or somesuchlike. Which would make your question rather irrelevant. The whole story of Stark tinkering with the old Visions body and him suddenly starting to regenerate, while Starjk doesn't really know what he did to start this process and considering the fact that a lot of the major parts were actually used by Iron Lad to build the new Vision, just doesn't seem plausible. The Avengers must be really shaken after the whole Serpent affair, to not notice that.