But don’t you think it’s strange to show a version of Anakin that we’ve never seen?
Tell that to the majority on this forum who for some reason insist on using Shaw.
Well, he actually looks like he’s supposed to be there and has a friendlier expression on his face. Also, it’s a de-facto ROTJ change to bring back Shaw’s ghost, because most of us prefer the OOT.
I like the aged-up Hayden with his ROTS hair (albeit grayed a little). It might help him fit in with his son a bit more. Provided that a similar injection of Hayden stock footage appears in ROTJ (like the previous example and what RougeLeader said), it would work.
However, I’m totally open to having young Anakin (but with the light-colored robes in his closeup) or Shaw (done in the style of Obi-Wan, a photo atop body stock footage). Young Anakin works contextually as well, as he’s appearing in front of Palpatine as the man who he manipulated into evil - he’s young again while Palpatine looks older than ever! Old Anakin worked in the context of the ROTJ ending, as he’s appearing to Luke/Leia as an uninjured version of his masked form. My headcanon is that ghost Anakin can change his appearance depending on the context.