There are already near perfect remakes of the pit in Halo Reach, along with many other maps such as Lockout and Hang 'em high which were both great maps from Halo 2 and Halo CE that Halo 3 didn't have.
Feel free to add IVDoc HolidayVI, thats me. I'm decent at matchmaking, I like playing around in forge and if you need help with the campaign on legendary I'm willing to help.