One remote possibility for how a connection might play out: if Steven and Susan knew each other in West Valley (no evidence that they did, or that their paths would likely have crossed), and were friends -- and when she decided to leave her relationship, she called on her old friend to help her get away -- and her husband found out about it and killed them both, assuming they were lovers. This would mean he hunted Steven down later -- which I'm not sure he had the opportunity to do. And there are other holes too.
I could see a similar scenario with somebody in Anthem. He went to help a friend leave an abusive relationship, husband caught them, killed him, has woman too terrorized to call the cops. Or killed her too only nobody knows she's missing.
I mean, I can make up scenarios all day. When there's very little evidence, there's lots of room for fantasizing.
...and lots of room to make stuff up, in direct conflict with known details.
We actually have more details in this case, than most. In what other cases, have we had the family's input, answers? In what other case, have WSers been provided details of phone records and bank activities?
The biggest hole in the S&S theory? Logic.
Susan Powell could have taken her purse and/or cash, bought a bus ticket to St George, and been long gone -- before her husband and kids arrived back from that "overnight camping in the snow" trip.
Since she could easily have done that, WHY would she take a bus to a far-away place in the wrong direction (Sacramento? Wendover?) to meet up with SK?
----------
And so, we have the problem of a family who's been open with us. NOW, we see that same family being accused of hiding their son's whereabouts, and purposely spreading falsehoods.
I can't entertain those with such theories and accusations, any longer.