There is talk now that Wall could attempt to go pro. He will be 19 soon and that part makes him draft eligible. He does not fulfill the second part (out of high school for one year) but Word of God is not an accredited school, so this could be a test case.
I agree with what dabvu says, Wall likes being in spotlight so I don't think there is a rush for him to decide one way or another (although April 25 is college to pro draft eligibility day...)