In Survivor: Heroes vs. Villains, I believe most or all of the challenges were reused from previous seasons. So maybe in Total Drama All Stars (which has a Heroes vs. Villains theme), they will reuse challenges as well. Which challenges do you hope would return to the Total Drama scene if they were to go this route? For me this is just a few:
TDI: Episode 2, Episode 3, Episode 4, Episode 9, Episode 11, Episode 12, Episode 13, Episode 14, Episode 18, Episode 20, Episode 25 challenges
TDA: Episode 1, Episode 5, Episode 10, Episode 11, Episode 14, Episode 15, Episode 17, Episode 21, Episode 22 challenges
TDWT: Since a lot of these challenges were dependant on location and we know that they won't be traveling again this season, I think I won't recommend any from this season.
TDROTI: Episode 2, Episode 5, Episode 6, Episode 9, Episode 11 challenges
By my count those were 26 challenges and that would match the season 5 episode count but yeah. Plus I'm aware that it'll be hard to replicate these challenges but it's just a thought. A Total Drama fan can dream, can't he (or she but I'm a guy)