What are your headcanons for what happens to the surviving characters in Sweeney Todd

In fandoms, a common thing is "headcanon," where things left ambiguous by the creators of a work are source for much speculation and conversation among fans of the work.

For example, in Sweeney Todd, we have three show leads alive by the end: Toby, Anthony, and Johanna. The show ends before we find out what happens to them (and that's fine). But I imagine many of us have wondered what became of them, the citizens of London, etc. following the events of the story.

Come up with your own (non-canon) epilogue to Sweeney Todd.

For me:

I think it's pretty clear Toby will be in an asylum for the rest of his life and all the Hell that entails.

Anthony and Johanna probably marry, but not for some time, with intense weight and strain is put on every interaction they have. Anthony finally sees the world for how awful it really can be, leading to a very traumatic interaction with Johanna.

Johanna likely fails to cope to life in the real world, possibly eventually suffering the same fate as her mother.

The police probably try to cover up the true nature of the pie shop so as to not stir mass panic. Inklings survive among the population through rumors, but nothing is ever released. Maybe a Penny Dreadful author gets a bright idea to turn the rumors into a serial, titled something like "The String of Pearls," which ensnares Sweeney into the collective memory of the West.