This is what happened to those missing animals
They become squad of three prototype "animal weapons," who were all kidnapped from a nearby city and encased in robotic armor. They were also given a limited ability to speak through skull implants. Their body armor has numerous weapons, including mine laying devices, machine guns and razor claws.
But then government wanted to decommission and kill WE3
Well i'm not going to spoil what happens but it's quite sad but beautiful story,so here's one more picture from it
By: Grant Morrison and Frank Quitely who you may known from All-Star Superman and Batman and Robin