That was read as a possible hint to the “West Coast Avengers” storyline where Vision had been disassembled, and was essentially dead, but Hank Pym was able to put him back together as this ghost version.
Some fans think this might be a hint to Vision returning as a ghost of himself, as he did in Marvel Comics.
The new Vision wasn’t just white, though, he also lacked the emotion of the previous Vision.
That was particularly hard on Scarlet Witch, who was then his wife.