From year to year, the competition for the La Liga champion is only contested by only two teams between Barcelona and Real Madrid, only once in a while other teams surprise the title race. Next season it looks like Barcelona will be a strong candidate to win the Spanish League because they have got several potential players from several other top clubs
The competition between the two teams has indeed been going on for many years and we can say that if both teams have dominated La Liga so far, next season Barcelona will probably enter the championship competition because indeed Xavi has succeeded in developing Barcelona game at this time, but for the champion, I am more inclined seeing madrid will defend their title next season, not only because of the capable squad last season but also madrid are very active in strengthening their squad at the moment, indeed barcelona have tried to sign some star players now, but there are only a few players rumors they got and even then do not have certainty because of Barcelona financial problems that hit.