The Halo 3 armor picture is stuck the way it was before the update. If you aren’t going to update it in some way, could you possibly set it to the default Mk VI set? Kinda like how Reach has default NOBLE Six.
EDIT: Wth the ODST update two months after this post, they have removed the pictures entirely (which did not even occur to me as an option), so this is no longer relevant.