The original plan was to be a middle ground between continuation and reboot, involving Daniel getting wisked away to a parallel universe in which Earth never found the stargate. He would help them start up the stargate program and everything using his past knowledge. That would have kept new viewers just as interested as a full reboot while retaining continuity with the rest of the franchise, but it just wasn't low-brow enough for Amazon.

https://www.gateworld.net/news/2026/08/daniel-jackson-amazon-cancelled-stargate-show/