Kompany left City for Anderlecht last summer.
"They have Pep (Guardiola) and no matter what, Pep is the right guy," he said.
"You never say over with City. It isn't in the hands of City and that is unfortunate but there is so much to look forward to.
"When you look how they have been performing in cups and the Champions League is still a massive target for the club, there is no reason to be disappointed about the season at this stage.
"It is an experienced team and they don't have to prove anything to anyone. They have done it, they know what it takes. It isn't about one season, it is about an era, a period of time."