By Steve Lackmeyer, Business WriterThe late Neal Horton is widely credited as being a visionary who saw the potential in Bricktown long before it became the state’s premier urban entertainment district. Now, a group of developers say another Horton vision from 40 years ago – one that suggested the greater downtown area would span west to Classen Boulevard – is also set to become a reality. David Wanzer and Ben Sellers, who bought the former B.F.