Phantoms shall fall
Danny Fenton, the half ghost, half human we all love, has to spend the summer with not just his usual amount of crazy family, but his uncle's family too. Although not all is as it seems in the mysterious town of Gravity Falls, and now there's more than just ghosts out to get him.
Dipper and Mabel Pines are spending a second summer in Gravity Falls, now both 13, and with all their old friends and family, what could possibly go wrong? A lot, it seems, as everything changes when Wendy's cousins come to stay in Gravity Falls, cousins that Grunkle Stan is convinced will be their new babysitters.
And why is Grunkle Ford so interested in Danny?
Danny Phantom - the last episode never happened, meaning him and Sam aren't together and his parents have no idea that he's half ghost. (Don't worry though, I'm pairing Sam and Tucker together so they're not left out!)
Gravity Falls - Bill hasn't attacked Gravity Falls, and has actually decided to go annoy everyone in the ghost zone instead.