"They've got a powerhouse batting attack," said Du Plessis after Australia cruised to a six-wicket win over his team at SuperSport Park on Friday on the eve of the departure of both teams for the world event.
"Every one of their top seven or eight can take the game away from you," said Du Plessis. "That makes them very dangerous. They've also good quality fast bowling. They didn't give us anything to hit in the first six overs. They have a very good chance of getting to the semi-finals."
Australia won the three-match series 2-0 to follow a 3-0 clean sweep against England earlier this year.
"We've got a lot out of the three games against England and the two weeks here," said Starc, although he admitted going to Bangladesh was a step into the unknown.
"I've never been there and a fair few of us haven't been to Bangladesh," he said. "But we've got a warm-up game against New Zealand which will give us a good idea of what to expect. It will be a case of doing everything as well as we can before that first game.