Prior to his move to China, Flores spent a season with Adelaide United where he took out the Johnny Warren Medal for best player in the A-League in 2010/11 and new Victory coach Ange Postecoglou is excited about now having him at Melbourne's disposal.
"Marcos is the type of player you don't really want to come up against as an opposition coach, so having him on board with us now will be really exciting - not only for the club, but for our fans also," he said.
"He's a quality player and I'm confident he'll show us the type of form that saw him win the Johnny Warren Medal a couple of seasons ago.
"I've said on numerous occasions that the overseas players who come out here need to get a season behind them before they really settle in, so for Marcos to be the outstanding player in the competition in that first year was a real credit to him."
"There is a new coach who has won two championships and wants to play great football - he is bringing in some new players and new ideas and this is exciting for me. Victory have many great players and I'm looking forward to getting to know everyone better."