Chuck Wendig's Star Wars: Aftermath tells the story of what life is like in the Star Wars galaxy after the events of Return of the Jedi, and the book contains multiple Interludes that set up other stories and might be setting up future books or films.
One such interlude takes place when an individual goes to the Jawas for some new hardware on Tattooine, and makes an interesting find.
From the box, he withdraws a helmet. Pitted and pocked, as if with some kind of acid. But still — he raps his knuckles on it. The Mandalorians knew how to make armor, didn't they? "Look at this," he says, holding it up. "Mandalorian battle armor. Whole box. Complete set, by the looks of it. Been through hell and back. I think my boss will appreciate this."
What Mandalorian do we know who was on Tattoine and might have suffered wounds from digestive juices?
So this raises some interesting questions. How does a complete set of Mandalorian armor make it out of the Sarlacc pit unless Fett was able to somehow escape? Why would he then get rid of his signature armor, and where is he now? Is it possible the Sarlacc digested Fett and just kind of burped out the armor, to be later found by Jawas?
Boba Fett was always a fan favorite, and there have been many spin-offs in the Expanded Universe that featured the bounty hunter, but those have all been rendered null and void by Disney. This is the first hint that the character may still be alive, and very much active in the official canon.