Alvarez is a Colombian who fights out of Montreal (in fact, he's never had a fight outside of Montreal)
He is 10-0 with 6 KOs and his best win is a wide UD12 over Cleverly's last opponent Shawn Hawk.
He's ranked #20 in the world by Boxrec, #15 by the WBO and this fight is for the WBO NABO (North American) title, so a guy from Norwich could call himself North American champion.
I haven't seen much of Alvarez but based on how poor McIntosh looked against Bellew you would expect him to win this.