I love how no one knows the answer, but that doesn't stop you from saying this or that.
The answer is that no one knows. And the official position from the WT articles is that no one knows and we do no good speculating. If a spouse dies, and the surviving spouse chooses to remain single, there's nothing to say that they can't be together after the resurrection. If a spouse dies, and the surviving spouse chooses to remarry, then they can. And who's to say the resurrected one can't be happy with that scenario. They are free to marry some hottie from the 2nd century B.C.
my 2 pennies