Then what?
If he were brought back alive, would we just have pictures similar to this to see over and over for the next decade?

Would seeing such a picture over and over again convince the doubters we had him? Really? At the end of the decade, we'd still have only an image on a screen or a sheet of paper, really. And the doubters would still doubt.
The only thing that would convince them would be a receiving line, where we the people could, if we chose, file past him and . . . . what? . . . shake his hand? Look in his eyes? Sit on his lap like some sick santa visit? We all know that ain't gonna happen.
So let's say we bring his body back. Same deal, really. Will they have some national mourning line. Will we get to file past the open casket and get to peer into his brain through his (former) eyeball? Will we get to pick off chunks and send them to our favorite DNA labs? Really . . . . what?
No matter what, all people would get is images.
And images can be doctored.
How many *still* think the Moon Walk was filmed just outside Vegas? Lots of pictures of that. Even physical evidence at the Smithsonian. How many think Elvis is alive, if a bit wrinkled, weathered, overweight, and unshaven, but well, on a small farm just down the road from Ted Kaczynski's place? We have pictures of the funeral. People even got to file past the actual body in the actual side yard of the actual Graceland and see his actual family actually mourning.
So really? What good would more than the telling of the story of last Sunday's events do?
It happened. We should all just settle down and take that fact to the bank.