Keep an eye out next fall CBS is looking to have lightning strike twice (see Hawaii Five-O) with a reboot of The Rifleman which the original "Pilot" ran on CBS before a five year run on ABC from 1958-1963.
There are also several others under development FOX has a Wyatt Earp docu/drama series written by John Hlavin, Alex Kurtzman and Roberto Orci from (Hawaii Five-0, Fringe, Cowboys & Aliens and the Star Trek reboot) will produce.
This may be a comedy more than a drama?
All of these probably want make it to air next fall but its interesting to see how networks are giving the Western a chance next fall. That's why its important that Hell on Wheels is a hit!
The Rifleman, the Wyatt Earp series and the TNT show sound promising.