Is it possible to intercept the connecting player on the current server and send them to another server IP?
I don’t believe this is possible. Only way I would see this being possible is by doing something with the deferal system, but I think you can not send the deferal to connect to another IP/server.
I would say it would be a neat feature to have like load balancing servers. Even though many security issues may arise.
Something like BungeeCord from spigot.
Exactly what I was planning on making. We will see if they can increase slots faster than finding a way to load balance lol