Rumours doing the round about this. UEFA apparently wants to have an NBA-like all-star game. Top three Northern-European leagues vs. top three Southern-European, aka a team consisting of players from Bundesliga, Premier League and the Russian League vs. La Liga, Ligue 1 and Serie A.
I myself think it could be a really cool way to end the season, if done 1-2 weeks after everything else is done.