Well, imho no change to band attachment.
the rumors on this dried out since the beginning of the year, latest rumors and drawings would indicate no change.
IF they were changing it, they will alienate a lot of buyers.
the band business for Apple is highly profitable, changing the attachment would likely result in more than 50% revenue loss imho, why would they do that?
the perfect opportunity would have been the Ultra, no one would have complained.
and as for adapter, all the bands that are fixed in length (solo, sport band etc) would become become “longer” and not fit anymore.
we’re like 6 weeks or so from finding out…