An interesting theory that may or may not hold up (MOO).
Mainstream LDS belief is that married couples can be married in the afterlife. That could even be a polygamous situation if a woman (we'll call her Tammy) were to die on Earth and the man get remarried to another woman (I'll let you pick a name for her).
However (this is where your theory may or may not fall apart) this only works if the marriage was what is called a "temple marriage" which, among other things, has to happen in a LDS temple. The temple marriage is for "time and all eternity" whereas the non-temple marriage is just the same as what normal people do and is just for this life on Earth. So, by mainstream LDS belief Chad is married to Tammy in the next life (I believe we know they were married in a temple marriage and think the obit or the stories about them even indicated that it was in the Manti, Utah temple). Or at least Chad and Tammy would be if Chad's reported excommunication (if that really happened) doesn't have an impact on this. (I'm not sure on that, someone else may jump in with more knowledge and let us know.)
While we don't definitively know that Chad and Lori didn't get married in a Mormon temple, I think we're fairly sure of that. So from a mainstream Mormon belief, unless the world lasts long enough for them to be able to essentially do the marriage ceremony again in a temple, they won't be married beyond this life. BUT ... if Chad's having visions he's probably in direct communication with God, just like Joseph Smith allegedly was, and he's in essence a profit (I mean prophet) and can make his own rules. So if he had a vision that temple marriages could be performed in some way outside of a temple due to emergency last days of the last days provisions, then maybe they believe they are married beyond this life.
All of this is pretty wild theory, but IMO, not that much farther out there than mainstream Mormon belief is relative to the thinking of the average random person on the street.
