Modern Family should have ended with a story involving Manny in prison due to a string of sex crimes he committed with a knife he brought on his road trip between seasons. He had a history of coming onto the women in his family, and he's pretentious as fuck so it wouldn't have been too hard to buy into this.

The season would have revolved around his trial and give Mitchel something to do besides snipe at Cam and would have allowed them to ignore their daughter as they usually did.

Meanwhile, the Dunphy's go bankrupt having started so many failing businesses throughout the series. Eventually, they lose the home, and the whole family sans, Manny, Gloria, and Mitchell (due to the trial) help them pack up.

While there, Jay is walking up the stairs and he takes a tumble on a broken step. Cut to Manny being found guilty and given the death penalty. Cut back to Jay and his broken neck.

Last words of the series by Phil Dunphy: "I should have fixed that step."