I am not sure what is going on but I know this, it would fit with all the things that has been going on with Cartoon Network lately. From the revival of the classic "Courage The Cowardly Dog" (which are reruns being shown with reruns of the Powerpuff Girls) to turning Saturday Adult Swim into Toonami. I wouldn't find it shocking that the Big C.N. are looking to bring new life into old classics, maybe they are testing out the market right now to see if anyone would watch the reruns on something other then their classic channel Boomerang.
All I can say right now, is that this is a rumor and any die hard fan may have made this sweet looking poster but with all the sudden shots of life given to old school classic programs, I have to think other wise till that day comes. I will say this, would love a new season of Dexter's Laboratory, Johnny Bravo, K.N.D.(Kids Next Door) and Ed, Edd 'n' Eddy. but for now would love just Power Puff Girls... would put my little pony in their place, that's for sure.
Link: Official Site