In his first major speech since Theresa May revealed her hopes for an early vote, Corbyn will deny that his party's historic polling lows make the June result a foregone conclusion.
And he will argue that “the media and the establishment” don't want his party to secure victory.
“Those people don’t want us to win. Because when we win, it’s the people, not the powerful, who win,” Corbyn will claim, arguing that a Labour government “won't play by their rules”.
“These rules have created a cosy cartel which rigs the system in favour of a few powerful and wealthy individuals and corporations. It’s a rigged system set up by the wealth extractors for the wealth extractors,” he is expected to say.
And Corbyn will begin Labour's campaign by reeling off a list of individuals and companies who would not want Labour to win, including retail tycoon Philip Green, Southern Rail and Sports Direct boss Mike Ashley.
Labour welcomed the prospect of an election when it was first put forward by May on Tuesday, and the long-time Islington North MP will today vow that his party will upset the odds, despite the public putting his party more than 20 points behind Theresa May's Conservatives.
“We will prove the establishment experts wrong and change the direction of this election - because the British people know that they are the true wealth creators, held back by a system rigged for the wealth extractors,” he will say.