In a recent story identification question a user was looking for a movie that, based on their description, was standard fiction with the exception that all the characters were opposite genders from what is typically encountered in real life (women more aggressive and authoritative, men more subdued and conservative).
Is this fantastical enough to be considered on topic?
Absolutely yes. The question makes it clear that the schtick here is that the gender-roles are reversed, yet treated as normalised, which places it firmly into the same category as our policy on alternate worlds.
The movie entirely reverses the gender roles: The men perform the stereotypical female household roles and wear aprons.
The same would just as easily apply (and be more obviously fantastical) if age roles were inverted, with children going to work and adults playing in the street.
We also learn (based on OPs self-answer) that there are clear alternate history worldbuilding elements in this story such as the replacement of the NFL with a parodical IWFL (Independent Women's Football League)
As the opening credits roll on black we hear the sound of a football game on TV and when the TV screen fades in we see it’s not the NFL but the IWFL – Independent WOMEN's Football League."
Probably
My reasoning is similar to this answer, but distinct. In line with that answer, any story that is set in an implied alternate history or alternate universe is on-topic, regardless of its lack of science fictional or fantastical elements. However, there are male homemakers and female gang leaders in the real world, so those plot elements by themselves are insufficient. Similarly, the Women's Football Alliance actually exists, so a poster for them cannot be taken as strong evidence of an alternate universe.
However, a statement by the filmmaker on her Indiegogo page offers strong evidence of an alternate society:
As the opening credits roll on black we hear the sound of a football game on TV and when the TV screen fades in we see it’s not the NFL but the IWFL – Independent WOMEN's Football League. We’re in the crappy home of the Dandy family, where the three sisters are die-hard football fans drinking beer on the couch and gambling on the upcoming championship game. In the kitchen their husbands cook and take care of the children, their eldest daughter Darla steps out to wash the family car, and all is well in the household - except for a little intruder...
Even though the IWFL also existed, the quote clearly seems to imply that the IWFL has the place of prominence that the NFL does in the real world—indeed, I am not sure whether any IWFL games were ever televised. Further, the description indicates a strong intention of building an alternate society with different traditional gender roles, not simply a description of one non-traditional family in a society otherwise identical to the real world.
No, it would be off-topic, per the talking animals rule. We have agreed that if a fairy tale tells about a story that would not count as fantasy if it happened to humans, but the story has talking bipedal foxes taking the place of humans, and everyone in the world considers the talking foxes normal, then that alone doesn't make this a fantasy story on-topic for our site. If you tell an ordinary non-fantasy story with the gender roles reversed, if everyone in universe considers that normal, rather than, say, a story about rebels fighting to turn the gender roles back to what we know in our world, that is essentially the same shtick.
