My opinion is Canning Basin is a distant long shot for Coal.
Cost are too high unless a major spends billions on railroads and ports which ain't going to happen with average thermal coal.
Shale Gas could be a punt in the Basin but not coal.
Rey's costs are $70 a tonne. Add Carbon tax and MRRT tax down the track and economic just don't stand up.
Worth a punt on Mongolia.
cheers.