Obviously. I'm not saying it's a good one. We had to let another cosmic entity out of the can to get the Spectre back to normal during the Blackest Night.

[ And normal for the Spectre still isn't great - it's just better than "Spectre is also a Black Lantern now." ]

But I can safely say that if it gets out, it will go straight for Galactus and it won't be satisfied with anything but getting it the hell out of here.