No. Courage had its run, and it had a great ending. The "perfect" episode and the one that revealed how Courage came to be in Eustace and Murial's care... it was a great way to end. Perfectly fit the series I believe. Plus, Eustace's voice actor passed away a while ago I believe.
No, Courage was a great show, but it had its run. I'd say its over and if it was brought back with new episodes... it just wouldn't be the same.
They've also shown re-runs of this show before, not sure why'd they make noise about re-runs unless they're doing what Nickelodeon did with their 90's shows. I hope it's the latter, at least. New episodes sound nice, but be careful what you wish for, you just might get it. And chances are it won't be as good as you think.