Probably nothing. I say this because there has to be a reason for him to have been killed, my opinion is though, and eventually we will see if it comes to fruition by nothing ever coming of it, is we are dealing with a man who simply didn't want to go out of this world without some sort of mystery twist to replace the fact he couldn't face dying in a prison someplace after having been on top of the world and dying a loser in the end, as someone who squandered his fortune and died penniless and unimportant. Know matter his low points in life he always somehow managed to rebound, this time he wasn't rebounding and he simply created another adventure to take his life into another realm of importance in his own death. Something like that, we'll see, well maybe we won't as that would be the objective. John died as adventurous as he lived his life.