Now that Blockbuster is no longer interested in acquiring Circuit City, what is next for the electronics chain?Blockbuster and its major shareholder Carl Icahn backed out of their $1-billion-plus offer after Circuit City opened its books for the suitors. Apparently, they didn't like what they saw.A MarketWatch commentator speculates that if Blockbuster, which has its own issues, isn't interested, then chances are that other potential suitors aren't either. Sources are telling BusinessWeek that Circuit City is near filing for bankruptcy protection. And to top it off, one of the chain's board members has resigned.To be fair, we didn't hear many people say they were crazy about this deal in the first place. So what's next? Will another retailer step in? Or is Circuit City's future bleak?