Super Dimentio in particular has always stuck out to me as something current-day Nintendo would NEVER greenlight (heh.)
No way they let Luigi - not some doppelganger, but the Luigi, get incorporated into something like that. If somebody even voiced the idea they'd probably be fired. Allowing such a marketable face to be associated - and well, be the literal face - of an entity like Super Dimentio would be anathema.
Shadow Queen Peach, too, but I think that's a bit less of an issue - she will be returning in a remake, after all - since it's a more cut-and-dry possession sort of deal, whereas Super Dimentio is partially - though of course only partially - fueled by Luigi's own long-held insecurities that were not of anyone's mind but his own, even if he's obviously not conscious of any of it
It also helps that Shadow Queen was already created before the formation of the wahoominati. A remake's a remake. I suppose the same would apply to an SPM remake if that ever happened.