I doubt that it will be serious physical fight. From wip leaks on Gleb twitter Dick gave Damian a gift and looks like they parted in a peaceful manner. It can be exaggerated solicits again, like solicit Jon vs Teen Titans and Damian vs Hush
Damian and Cass bonding happened on Gates of Gotham, but yeah maybe it's erased. I will put Jason and Damian relationship on 'were ruined by DC bullshit' because of that stupid Teen Titans stuff. They were never so close but still