What new national teams leagues and clubs will ea add into Fc 26

They have not added any new league in FC 26, so all the same leagues from FC 25 are still in FC 26. They removed New Zealand from the Mens National team and added Denmark and Poland womens national team. 

So national team wise for mens there are:

2 African national teams

1 Asia national team

22 Europe National Teams

2 North America National Teams

0 Oceania national Team (Now that they removed New Zealand)

1 South America national Team.

FC 26 will contain the same national teams leagues as FC 25. National team leagues that do not have a second, Third or Fourth division in the game will have new teams in them that have been promoted and teams that have been relegated will be removed. 

I hope that makes sense.

Have a good day.

He was not talking about national teams. If you read his post correctly he was referring to LEAGUES.