I can't decide, just want other opinions

Ooooh, I really like Deion also. If not Deion, I would say Anton. Seriously though if you are even THINKING that his dad may not be significant in his life, name your baby what you want to. It is, of course, his baby also. But, I'm guessing you know him and you truly know what role he will pay in your child's life. And if he turns out to be a huge part of his sons life, he is not going to care what his name is. He will love him regardless. He can just call him James if he wants to.