For example, I want to set up a German 4.Liga below the 3.Liga, which starts in 2024/2025 season. That competition will extract the 4 relegated team from the 2023/24 3.Liga and 20 best teams from the 5 Regionaliga. From then, the 4 best team from the 4. Liga will be promoted into 3.liga, and the worst 2 team from the 4. Liga will be relegated into Regionaliga.
Is it possible?