You bring up an interesting point about the potential challenges of bringing Sheldon Cooper back in a Young Sheldon spinoff, especially after the way Young Sheldon ended.

As you mentioned, the Big Bang Theory finale gave a fitting conclusion to Sheldon’s adult life, with the Nobel Prize win alongside Amy and their growing family. Young Sheldon seemed to provide the prelude to that ending, so it felt like the character’s journey was wrapped up nicely, leaving little room for further exploration.

Given that Sheldon’s character is already established and his storyline reaches its conclusion in The Big Bang Theory, the prospect of including him in a spinoff focused on Georgie and Mandy’s marriage feels tricky. Sheldon’s adult life, while full of growth, was already well-defined, and his strained relationship with Georgie during the earlier Big Bang Theory years doesn’t make his return in Georgie & Mandy’s First Marriage feel necessary.

That said, the show always can explore untold moments or address any lingering questions about Sheldon’s younger years, but doing so might risk altering the original show’s conclusion or feeling forced. Sheldon’s arc was very much about his relationships with those closest to him, including Amy and his friends, and it would be hard to create new storylines that feel both organic and true to his established character.

As for Georgie and Mandy’s relationship, it seems like there’s more room to explore their dynamic without relying too heavily on Sheldon’s involvement. Their storyline can stand on its own, so any appearance by Sheldon might need to be minimal to avoid overshadowing their journey. It will be interesting to see how the writers handle this delicate balance.