Fathers 4 Justice is preparing to ditch its shock tactics and superhero theme in a bid to be taken more seriously.
Founder Matt O'Connor said: "We are announcing some radical changes that will see us become a much more sophisticated and heavyweight organisation."
Fathers 4 Justice has been blighted by allegations of violence involving some of its members, including O'Connor himself.
This week, one of its most high-profile members, Jason Hatch, who climbed a ledge at Buckingham Palace while dressed as Batman, was suspended by the organisation after being accused of duping a pensioner out of £500.
O'Connor said: "There has been an allegation of impropriety and we are currently investigating it.
"We are often accused of being unprofessional, but this shows that we do actually have standards and the changes we are making will be taking us in a completely different direction."
Hatch denies the claim.
In an interview with Third Sector (15 December 2004), O'Connor revealed that he took his inspiration from the US civil rights movement.