To be fair, he was in contact with WWE over the days that all of this shit went down, so they were on his mind, enough to where he went to all the trouble to call them, change flight plans, text friends in the company, and all of that.
Once again, the man tied up his wife that he loved so much, and killed her in a vicious way. He not only killed his son, but likely used some type of wrestling hold, a hold many believe to be at the very least a modified version of his actual wrestling finisher.
That right there is enough to lead me to be open to believe just about anything, including the possibility that he was so pissed at the industry, that he also loved so much, that he made some final attempts to harm it in some way just as he did his family. Who the fuck knows what went on in his head.