That’s the background for Brothers Lost, and John does not end up finding the brothers. He believes them both dead, and leaves the motel.
He was supposed to be out there. Saving people. Hunting things.
He wasn’t supposed to be the victim. Trapped by a witch and a curse that tore his entire world away. Everything gone but Sam himself.
Dean skidded to a halt when he reached the end of the bed and scanned the room once more. Sam did the same, checking their area in case Dean missed anything. Patience was key, as Walt repeated over and over again.
He held a hand out to Sam, signaling that he would go first. He was the oldest. It was his idea, so he’d take the risk.