I think the Cleveland Show has surpassed both Family Guy and Simpsons in quality thus far, followed by American Dad and Futurama. I still enjoy Family Guy and Simpsons enough to watch them if I see that they're on, but they don't feel anywhere as fun as they used to. Same as Futurama, but that was such high quality in the first place that it's still pretty good. I like the idea of a crossover, but I agree that it's just too late. I'm not expecting it to be good, but I hope at least it isn't depressing.