1 year until the UEFA Nations League starts, this is how the 4 leagues are looking currently:
LEAGUE A (teams to be split into four groups of three)
Germany, Portugal, Belgium, Spain, Switzerland, France, England, Italy, Poland, Croatia, Iceland, Wales
LEAGUE B (teams to be split into four groups of three)
Russia, Northern Ireland, Slovakia, Sweden, Netherlands, Ukraine, Bosnia and Herzegovina, Austria, Turkey, Republic of Ireland, Denmark, Hungary
LEAGUE C (teams to be split into one group of three, and three groups of four)
Slovenia, Albania, Montenegro, Serbia, Scotland, Czech Republic, Romania, Greece, Bulgaria, Israel, Norway, Cyprus, Finland, Estonia, Azerbaijan
LEAGUE D (teams to be split into four groups of four)
Lithuania, Belarus, Georgia, Armenia, FYR Macedonia, Faroe Islands, Luxembourg, Latvia, Moldova, Kazakhstan, Liechtenstein, Andorra, Malta, Kosovo, San Marino, Gibraltar
What country will go to which league will be decided after the World Cup qualifier groups are over in October.
I honestly love this. Gets rid (or lessens) useless friendlies and more competition is always welcome.
For those unware how this is going to work by the way, I'll try to explain it: all 55 UEFA members will be placed into 1 of 4 Leagues based on the Interim National Team Coefficient Rankings. The Leagues will then be split into 4 groups each (4 groups of 3 for League A & League B, 1 group of 3 & 3 groups of 4 for League C and 4 groups of 4 for League D). Groupstage matches will be played in September, October and November 2018. The winners of the 4 groups from League A will go to the Final Four Competition which will be played in June, where they'll decide who the UEFA Nations League Champion is.
Then, from March 2019 through November 2019 the regular Euro 2020 qualifiers will be taking place, with all 55 countries being put in 5 groups of 5 and 5 groups of 6 (with the 4 countries which attend the Nations League's Final Four competition being guaranteed a place in a group of 5). The top 2 from each of these 10 groups will then directly qualify for the UEFA Euro 2020.
Then, in March 2020 the Nations League playoffs will take place. The best country from each group (a total of 16 countries) will face the 3 other countries from their League for 1 of the 4 final tickets. If a country which has won their group has already qualified via the regular qualifiers, their spot will be given to the next best country from their League which hasn't. This means that at least 1 country from each of the 4 Leagues qualifies for the 2020 Euro. Look at the above list of countries again, at least 1 country from League D will qualify.
And finally, if you win your group you get promoted to the next League, and if you finish last in your group you get relegated.
