The Final Scene for Dunk & Egg (Spoilers Extended)

The next novella we should expect to get in the series is The She-Wolves of Winterfell (working title), even though GRRM has plans for numerous novellas spanning their lives, culminating with both of their deaths in the Tragedy at Summerhall.

In the Sworn Sword, Dunk has a dream/vision in which he and Egg are drowning in sand:

The spade slipped from Dunk's hands. "Egg," he cried, "run! We have to run! " But the sands were giving way beneath their feet. When the boy tried to scramble from the hole, its crumbling sides gave way and collapsed. Dunk saw the sands wash over Egg, burying him as he opened his mouth to shout.

He tried to fight his way to him, but the sands were rising all around him, pulling him down into the grave, filling his mouth, his nose, his eyes . . . -The Sworn Sword

Now lets just basically change sand to fire/flames and see how it looks:

The sword slipped from Dunk's hands. "Egg," he cried, "run! We have to run! " But the floor (due to fire) was giving way beneath their feet. When the king tried to scramble from the hole, its crumbling sides gave way and collapsed. Dunk saw the flames wash over Egg, burying him as he opened his mouth to shout.

He tried to fight his way to him, but the flames were rising all around him, pulling him down into the grave, filling his mouth, his nose, his eyes . . . -The Sworn Sword (paralleling what happened at Summerhall)

Compared to what we know about what happened at Summerhall:

...the blood of the dragon gathered in one... ...seven eggs, to honor the seven gods, though the king's own septon had warned... ...pyromancers... ...wild fire... ...flames grew out of control...towering...burned so hot that... ...died, but for the valor of the Lord Comman... -TWOIAF, The Targaryen Kings: Aegon V

Ser Uthor's words ring true:

The snail may leave a trail of slime behind him, but a little slime will do a man no harm… whilst if you dance with dragons, you must expect to burn." -The Mystery Knight

If we keep in mind that Egg was trying to bring back dragons using some form of sorcery (likely a very similar ritual to Dany/Stannis/etc.), it makes even more sense imo. Excuse me while I go cry.

TLDR: A passage from Dunk's dream in The Sworn Sword, could end up paralleling the final scene in Dunk & Egg.