Hughes was ruthlessly sacked by City two years ago.
He said: "At some point in the near future they will win it, without a shadow of a doubt. That's because they have the resources to do it. It will happen for them.
"They have to go through the process of earning the right to win trophies. They have won one - the FA Cup - and that was a big step because you have to learn how to win trophies and the first one is difficult.
"It might take some time but they will get there."