90% certain he was shot. My personal theory is that the guy in the beginning of the series, with the grey jackeeeet ^^, members only, was in relations with Gene somehow, and that he was taking revenge on Tonee-onee for pushing him to suicide. It's that complex.
But it could be many things. There are many dropped ^^ hints during the last season.
If you look at him, he sort of looks like Gene also. Same rough type look. Yeah, no doubt in my book. Tony Uncle Johnny should definitely have been more careful there. I can't believe he let him give him the slip, into the toilet like that. Just ... very out of character.
But i can sort of understand it too, psychologically. I am a pretty good hobby psychologist, you know. The war with NY was just over. That's a huge sigh of relief. Now he can relax. And he did, a little bit. Just enough to get off'd.
One has to be kind of sad, because he wasn't a complete nutjob. Just a halfway one, lol.
There are very good elements to the sopranos. I've watched it perhaps 10 times... of course i have it on second screen while gaming n chattin on the first big screen. But i of course follow the action and listen all the time. So i blow through episodes like tony blows through rigatoneeeee ^^ I'm not schtoopid.
I guess it is a safe bet that he was probably shot, especially due to the famous quote; "You probably don't even hear it when it happens, right? Just... fade to black." Which is exactly what happens.
Do you believe that Christopher deserved to die? I know that after the crash tony looks back and sees the car seat... And he believes that Christopher is a loose cannon and can't be trusted to stay on the straight and narrow. But I think Tone was too harsh.