That was a really great episode, easily the best of this season (not counting the cross over).
I liked how they setup what everyones going to be looking out for now for the rest of the season with who will betray him, who will die, who will suffer a fate worse then death thing although isn't that kinda something they hinted at with arrow and the new recruits (One will die, one will live, and one will betray Oliver?).
So as to who will do what....
Betray: Either Julian or Wally or HR (it seems odd that Wally wasn't directly mentioned/shown in the future but that might be just to keep people speculating, HR just out of fear in general)
Fall (Die right?): Julian or Joe (PLEASE GOD NOT JOE!!)
Fate worse then death: Julian or Wally or HR
Either way I'll be fucking shocked if Julian makes it out of this season unscathed although I do deeply enjoy him as a character for not letting Barry get away with any of his normal bull shit.
Also really glad they didn't try and keep the secret of him being Alchemy around for most of the season and try to use it as something to pull the rug out from under everyone since it was super obvious. Really enjoy the idea that Savitar came back to the past to fuck up Barry because future Barry fucked him up. Jesus future Barry what the shit.