The Amazing Race: Season 26

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object with overview and primer.
Constraints:
Use ONLY provided SYNOPSIS and SOURCES.
overview: 160-220 word factual summary of the season's narrative arc.
primer: Array of exactly 4 concise bullet points summarizing essential previous lore, character positions, and stakes.
No invented/guessed info (titles, names, dates, counts, awards, ratings, etc.).
If not in material, omit.
Style: Original, neutral, encyclopedic prose, plain text (no markdown, no asterisks, no headings, no bullet points).
Output: Valid JSON only.
TMDB Synopsis: Season 26 is the upcoming 26th installment. Teams consist of eleven dating couples. Five of these teams meet for the first time in a blind date. They race around the world for a US$1 million grand prize.
Source [1]: General info about the show.
Source [2]: US CBS reality program. Started in 2001. Mentions 22 seasons broadcast and 23 being produced (Note: This contradicts the TMDB synopsis which says Season 26 is upcoming, but I must follow the specific season info provided in the synopsis for the overview).
Source [3]: Teams trek around the world, compete in mental and physical challenges. Tasks must be completed to learn next location. Teams farthest behind are eliminated.
Source [4]: Episode list (no content).
Source [5]: Hosted by Phil Keoghan. Mentions "This season, 13 teams..." (Note: This contradicts the TMDB synopsis which says 11 dating couples for Season 26. I must prioritize the specific Season 26 synopsis provided). Teams who come in last each leg are eliminated.
Overview:
The Amazing Race 26 is the twenty-sixth installment of the reality television series The Amazing Race. In this season, the competition features eleven teams composed of dating couples. A unique element of this season involves five of these teams, who will meet for the first time via a blind date. These teams participate in a race around the world to compete for a grand prize of US$1 million. As part of the competition, teams embark on a trek to various amazing destinations where they must complete a series of mental and physical challenges. Only after these tasks are successfully completed will the teams learn the details of their next location. Throughout the race, teams that are the farthest behind will be gradually eliminated from