I'm surprised they offed King Shark since he's been a mainstay for the Squad for some time, but besides that the others killed off are replaceable, but I highly doubt Killer Frost is dead anyway so that just leaves Spider, maybe bring in Bronze Tiger for him, in Arkham Origins Blackgate they strongly hint at him joining the squad.
Also I'm loving Black Manta in the New Suicide Squad, would be great to see him in a future movie on the team.