If anybody is interested (doubt it

p) here is Croatia's provisional squad.
Goalkeepers: Matej Delac (Chelsea, ENG), Dominik Picak (Lokomotiva Zagreb), Michael Paradzikovic (Cibalia), Simon Sluga (Rijeka)
Defenders: Vedran Celjak (Sampdoria, ITA), Renato Kelic (Slovan Liberec, CZE), Dario Rugasevic (Cibalia), Matej Jonjic (Hajduk Split), Roberto Puncec (Varazdin), Tomislav Glumac (Zadar), Mislav Komorski (Lokomotiva Zagreb), Marko Leskovic (Osijek), Ivor Horvat (Lokomotiva Zagreb)
Midfielders: Arijan Ademi (Dinamo Zagreb), Filip Ozobic (Spartak Moscow, RUS), Frano Mlinar (Lokomotiva Zagreb), Zvonko Pamic (Bayer Leverkusen/Freiburg, GER), Franko Andrijasevic (Hajduk Split), Ivan Blazevic (Inter Zapresic), Mario Situm (Dinamo Zagreb), Mateo Kovacic (Dinamo Zagreb), Mario Ticinovic (Hajduk Split), Marko Bicvic (FC Basel, SUI), Dejan Glavica (Varazdin)
Forwards: Ivan Lendric (Zrinjski Mostar, BiH), Andrej Kramaric (Dinamo Zagreb), Filip Skvorc (Varazdin), Anton Maglica (Osijek), Antonio Jakolis (Sibenik), Marin Zulim (Zadar)
As spidey mentioned, Vrsaljko (Dinamo) and Vukusic (Hajduk), arguably the two most valuable players were not released by their clubs. Petar Sliskovic of Mainz I think is on standby. These players made the semi-finals of the U19 UEFA Championships so there is some talent but obviously none of these guys will "wow" outsiders on paper. The guys who play for Lokomotiva are all Dinamo Zagreb youth players, they are essentially Dinamo's reserve team.
- Goalkeepers is not the most impressive. Delac was bought by Chelsea but he has struggled to play on loan at Vitesse and hasn;t looked good with the U21s. All the other guys are juniors
- Defense was the strong point at the U19 tournament, Vrsaljko is missing but a guy like Renato Kelic is one to look out for. Komorski is also a solid defender. Most importantly these guys are playing at the professional level with the exception of Celjak who was in the Samp primavera
- Midfield is so-so, some talented players but many of them didn't have a great club season. Kovacic is 17 years old, I would assume if he makes the squad he would be the youngest player at the tournament.
- Forwards: Vukusic is missing but Lendric will probably take his place, he was the top scorer of the BiH league. Sliskovic is on standby but he would be a good asset. Kramaric has talent but barely plays
Easy group on paper, Nigeria are the favorites in my opinion, but Croatia's preparations for this tournament do not fill me with alot of confidence. While most players are starting to train already, the team will be together for two weeks and have no friendly match scheduled. They will arrive in Colombia only 5 days before their first match. Overall the squad did achieve good results in the U19 tournament where they played Spain, Italy, Portugal and France, some of the top European youth setups but I wouldn't boast about too many of these players
I think Austria are also having some problems with some of their players not being released, don't know how this is possible as this is a FIFA tournament