It's also worth mentioning (or re-mentioning? I can't keep track of what's been said) that the organ waltz "intro" from months later is not actually an intro, and was never labelled that way - that's something that was lost in translation when the GV box set was made, and the label stuck for TSS too. Brian starts to play "my children were raised..." after that piece on the tape, for what it's worth.
The March organ waltz then Intro to Heroes was marked on the tape box as Intro to Part 2, wasn’t it, and logged as a Heroes session? Since Brian had been working on a side B for a 2 sided Heroes single in February after the cantina mix was finished, the presumption is this was to be an intro to the second side of the single. Musically it’s identical to the Chimes Part 3, although as pointed out that Part 3 would have followed the A side’s Part 2 which was first Great Shape, then Bicycle Rider, and finally cantina.
The tape box, which mostly consists of the verse remake session, says "Intro to Heroes and Villains", and the organ waltz section was recorded hastily at the end of the date. I haven't seen a scan of the box itself, but I'd imagine that the notation is in reference to the section that took the majority of the session to record, and which is actually the first part of the song in all other mixes. I can't see the waltz section being an intro, with Brian playing CWR at the end of the take. Though, maybe a clearer look at what exactly is written on the box could help solve that one! Anything is possible.