I don't know what the others think, but the all CAW idea (If that's what you want) is totally the way to go. Yeah, nobody would know anything and be able to get attached from them off the bat, but a well written show with entertaining storylines and angles is a well written show with entertaining storylines and angles. I know a lot of the guys I use are guys people aren't aware of generally. So i'd rather be able people who read to relate to them based on what I write them as more than anything. The matches can work too, if you present your wrestlers where everyone knows their size/moves/etc. Pretty much every TV show in history uses original characters that nobody knows, I don't know why wrestling or BTB can't work the same.
I might be wrong, but my two cents anyway.