They've got some massive talents coming up, one of the teams for the future...
Goalkeeper: Courtois (big talent, owned by Chelsea but currently playing for Atlético M.)
Defenders: Kompany (world-class, Man City captain), Vermaelen (Arsenal), Vertonghen (Ajax, but linked with AC Milan, Tottenham,...), Van Buyten (Bayern Munich, personally hate him), Lombaerts (Zenit),... The problem is that they don't really have good natural lb's and rb's
Midfeelders: Witsel (Benfica), Fellaini (Everton, amazing heading ability), Defour (Porto), De Bruyne (Genk, but big interest from Chelsea), Vadis (Club Brugge, linked with Valencia), Naingollan (Cagliari, linked with both Inter and AC),... DM is currently Simons, he doesn't add much technically but he's tactically very strong and guides the younger players. They might need a real playmaker but they've got an amazing talent coming up. Charly Musonda Jr. has already had serious interest from Barcelona and many other big clubs.
Attackers (wingers included): Lukaku (Chelsea), Hazard (Lille, one of the most wanted young players of the world), Mertens(PSV, 'till a few weeks ago he was topscorer in Holland as a winger), Chadli (Twente), Dembele (Fulham, with interest from tottenham), Vossen(Genk), Ogunjimi (Mallorca),...
Not all of these players are world famous, but this really is a talented generation. The belgian U16 are also considered one of the top-favourites for the European Championship.