Ranking seasons based on how important they are to watch before Heroes vs. Villains. Mostly based off of how many people from these seasons are competing, and who is the most important to the season in Heroes vs. Villains. I will just leave the list without reasoning in fear of spoiling any of these seasons
13. Survivor: Guatemala
12. Survivor: Gabon
11. Survivor: Palau
10. Survivor: Marquesas
9. Survivor: Panama - Exile Island
8. Survivor: Samoa
7. Survivor: Tocantins
6. Survivor: China
5. Survivor: Cook Islands
4. Survivor: The Australian Outback
3. Survivor: Pearl Islands
2. Survivor: Micronesia
1. Survivor: All Stars
Keep in mind that Survivor: Heroes vs. Villains will spoil a lot of, if not all, of these seasons. However, if you only intend on watching a few seasons beforehand, I think that this list is a good one to follow.