It should be pointed out, though, that because Andy’s story concluded in Toy Story 3, that potentially decreases the chances of her appearing in Toy Story 4.
But if the fourth installment does manage to validate this theory, at least we know Tom Hanks is on board for the twist.
As for how this theory was formulated, someone online noticed that Andy’s red cowboy hat in Toy Story 2 not only looked like Jessie’s, but it also had a faded mark where the white lace should have been.
Emily wore that same kind of hat as a kid, only hers had the lace.