saw this over at easports... thought id share it here since theres been a lot of talk about it...
"Hello, all. Just a couple notes on rosters for both FUT WC and World Cup Kick-Off.
FUT World Cup Rosters
As some of you may already know, new players can only be added to FIFA Ultimate Team via the retail disc or a title update. To prepare for our latest FUT World Cup title update, we needed to lock our roster
database weeks before the national team preliminary World Cup squads were announced. Therefore, we looked at including players who have already made at least one competitive appearance for their respective national team.
This is why some up-and-coming youngsters such as Shaw, and Griezmann are currently not available in FUT World Cup as they have only played in a friendly match, or haven't represented their national team yet. An exception was made for Diego Costa, who is most likely headed to the World Cup.
2014 FIFA World Cup Brazil & World Cup Kick Off – Roster Updates
EA SPORTS 2014 FIFA World Cup Brazil (360/PS3) and World Cup Kick Off (XB1/PS4) rosters will be fully updated soon after June 2, which when all national teams are required to confirm their 23-man squads for the World Cup"
it seems as if there will be an update coming soon to update the rosters prior to kick off of the WC.
the link:
http://forum.ea.com/uk/posts/list/2865806.page