So we got the reveal that Scopper was one of the more prominent members of the crew and on the cover page for Chapter 631, Crocus was meeting a mystery figure. Crocus had previously met Rayleigh in Chapter 591 so it most likely has to be someone who he knows really well or more likely a fellow Roger Pirate.
Also, the hair shape appears to be exactly the same as Scopper's, however, there is one contradiction, namely, the color of his hair. Scopper in The Strong World movie was presented with black hair and the figure in Chapter 631 has blonde hair, so many people automatically discounted Scopper as being the one who was meeting Crocus.
However, I would like to posit that maybe the color scheme for either Scopper or that figure was wrong, as it has happened before. Many times the anime and manga get coloring wrong, i.e Giola's color scheme and Enel's lighting to name a few. You might also think that because Scopper's hair is shaded black that it is most likely going to be a dark color, but then again Queen who was shown to have dark shaded hair was revealed to be a blonde.
I think it is extremely likely that the figure is Scopper Gaban and because of his attire, which is very Wano-esque, we might see him at the end of the arc. Maybe he will impart some wisdom about finding Raftel as he has some navigation knowledge or he could reveal to Luffy the happenings in the world and what effect that would have on him.
People have posited that it could be Shiki, but Shiki's hair is much longer and he would not be able to wear that Amigasa because of the ship's wheel embedded in his head.
Edit: After
@Garp the Fist commented with Yorki being the likely candidate, it seems to be a much better guess than Scopper. I still think it will either be confirmed or denied when Scopper is either animated in the anime or the digitally coloured chapters catch up if Scopper is blonde. If he is black-haired, then I think it is going to be much more likely that he is either Yorki or someone else.
