It so happens I am imagining the same thing...
Time: 11 years later Scene: The Potter Residence
Ginny: Was that the morning owl, dear? Harry: Yes, petal. Ginny: Anything interesting? Harry: Yes, there's a letter from Teddy! His first from Hogwarts. Ginny: Oh, let me see! He was sorted into Gryffindor, of course... Harry: Er... no... Ginny: Must have been Hufflepuff then... Harry: No... Slytherin. Ginny: ..... Harry: .... Ginny: There must be some mistake.....