I doubt there will be any time manipulating characters. The player pool here tends to shy away from the extremely powerful characters. I suspect most fights will fall into realistic or powered but not extreme powers.
I think Innue is right. If I accept a fight against a time manipulator I am using my character that has powers/abilites to deal with it. The issue is if you accept that type of fight you are entering it with your eyes open. Don't complain later. Remember you are responsible for accepting and stipulating the parameters of your fight.