I Disliked this Movie, but Another Sequal? Also...
As I mentioned in my comment to this movie, I didn't like "An Extremely Goofy Movie" NEARLY as much as "A Goofy Movie" because much of its premise is overused. Not to mention the DVD kind of sucked compared to the first movie.
But since the trend of the movies is obviously supposed to follow Max growing up, I really feel there will likely be one more movie, about maybe him graduating, or entering the workforce, or as some others I have heard say, some form of marriage. But they obviously can't run it forever to the point he is actually older than Goofy.
And if they do make one more sequal, they better not use the sorely overused "Sports Game Against Cheaters" premise, which is in my opinion, what really killed this second movie.
But on Disney's official site FAQ, a question was asked about Max's mother. Back when Max was known as "Geef Jr." and Goofy played the role of Geef as a sort of other family man (believe it or not, the concept of Max did not begin with Goof Troop), there was a sort of mother to Max and wife to Goofy. However, she was just a voice that was never on screen.
Disney said there may be some future feature film or television show that may finally address this question. Let's assume the mother is NOT dead. Does not the appearance of Sylvia actually introduce the possibility of an interesting conflict in a possible film should Goofy's wife finally make an appearance?
EDIT: Apparently, back when Goofy was known as "George Geef" for a few episode or comics, he did indeed have a son called "Goofy Jr." And he did have a wife that was simply "Mrs. Goofy". We do see her...sort of. We never see her face.
EDIT2: And not related to the movie directly, but I was just wondering something. It is clear from the first movie that there is no denying that anthropomorphic ducks and mice exist in the modern Goofy Universe, what with the cameo of Mickey and Donald. But somehow, everybody is still an anthropomorphic dog in these movies. Similar to cases like the old Duck Tales. Obviously there was more than just ducks, because there was people like the butler (forgot his name). But nearly everybody else in the series is a duck.