In the end, the original timeline was restored and everything was happy between Fiona and Shrek and their family once again.
In addition, we now know that script will take the franchise in a totally new direction.
It’s hard to know what else there might be to explore in that storyline, especially considering it has been a while since Shrek Forever After came out back in 2010.
Perhaps pivoting to a different character–maybe even Fiona and Shrek’s kids now older kids?–might be that route.