I was going through some old leaks for Doctor Strange In The Multiverse Of Madness just to be sure I wasn't remembering it wrong, and I found
this one from August 2021, which turned out to be surprisingly accurate for the most part. Some details were off, and it looks like some of the stuff might've been true but ended up being cut or changed after reshoots (there is at least one thing they mention here that we know was cut because of the film merch). This was, as far as I can tell, the most reliable leak from last year. I doubt this person was just a random with a lucky guess, because there are way too many details they got right. And yep, it DOES mention older Billy and Tommy appearing in the end.
So now the question is... was this cut? Did they give up on the idea? Or did it just happen to be one of the few things this person got wrong? The world might never know, but I just wanted to share because it is interesting to think about.