I thought I'd recommend my favorite trolls fic!
Rewinding Our Fate by trollsbuzz
It's a "What if the trolls movies were a dream and Branch remembers it all?" fic and the broppy content is so good!!
https://archiveofourown.org/works/54234016?view_full_work=true
Rewinding Our Fate by trollsbuzz (thatbennybee) - ao3, 146k - T (Incomplete)
What if it was all a dream? AU
Ships Tagged: Branch/Poppy
When Branch got home after their long journey and reunited his and Poppy’s families, Branch was so happy that it almost felt like all the great adventures he and Poppy had been on were a dream... Then, as he jolts awake, he looked down at his grey skin to realize that it actually was one. He’s back to the day that everything started; the 20th anniversary of their escape.
Or
Branch wakes up back at the start of Trolls 1 but he’s the only one with the knowledge of what’s to come. But who would listen to miserable, paranoid, grey Branch?