Explain to me the spinoff show

I've heard rumblings that there was gonna be one, but don't know any details into it. I thought rick getting his ass kicked puts a negative spin on the show. Makes him look weak, but that's my opinion. I always thought Hershel would be the leader before it was over but I was obviously wrong. I have kinda scanned over some of the comics but not enough to know where it's headed. Give me some of the juicy details please kind sir.