A season and a team in disarray and turmoil, a franchise at a crossroads, a watershed moment looming. The succession plan for Eli Manning. Here’s mine: Draft one of the plums of the Class of 2018 — Sam Darnold, if he decides to leave USC, Josh Rosen or Lamar Jackson. Have Manning serve as his mentor in 2018. Ask Manning if he would be amenable to a pay cut at some point so he can retire as a Giant, even if it as a backup. In the meantime: “He’s our quarterback,” coach Ben McAdoo said Monday. “I have a lot of confidence in Eli. That hasn’t changed.” It shouldn’t. Not now. Manning is proud of his 207 consecutive-game regular-season starting streak. “It’s not about one person’s starting streak continuing. … Hopefully they think I’m the best for the team, give us the best chance to win, and if they don’t believe that, then you gotta do what you gotta do,” Manning said Monday on WFAN. If you bleed Giants blue, you belong to one of two schools today: You have been dreading this day because of your affection for The Greatest Quarterback in Giants History and your gratitude to him for those two Super Bowl championships.