Can you imagine what would happen if bruce WASNT BATMAN and instead his children were these "superheros of gotham" and he of course knows about it. But he doesnt join them. He has the whole company to run, there is no time for that. But on rare ocasions, when his children are all in beds or busy, he comes.
They call him the bat's father. He shows up and destroyes his children enemies. Not by fighting with them psyhicaly, but by destroying their lifes.
He can. He has money to do so. They hurt his children. Nobody hurts his children.
Also bruce is still the Best detective in the world, and Just acts like he doesnt know about his children being vigilantes.
Alfred know about everything. That kids are bats, that bruce know but lies about it, and that bruce takes revenge. He patches the children after rough fights, and helps bruce with his revenge.
After the big reveal, where bruce officialy finds out, children makes him a costume.
The batman is now taking revenge for his children peronaliy.
