FWIW, my TA has an feeling about on the net verify in, in common. If you are flying, she suggests not to hit the on line check in button right until you are at your gate and about to board the aircraft. She states that if for any explanation it looks like your flight could be delayed or there is a snafu in your traveling and you could possibly not arrive at all the night of your check out in, Disney has more flexibility to lengthen “grace” if you haven’t started the check in method on-line.
I know this is not straight similar to receiving an update, but my TA has not steered us erroneous nevertheless in any of our visits. Just considered I would share.
OP, have a magical excursion!!