According to this news article (German only, I'm afraid) Spiel 2016 is all set to smash some records: more than 1000 exhibitors are expected (up from 911 in 2015, in itself a record), from 50 countries (up from 41 in 2015)... and to accomodate them all halls 1, 2, 3, 4, 6, 7, and the Galeria will be used.
One little snag: the entry price will be raised somewhat. A 1-day access pass for an adult will cost €13, up from €11,50. (Which has been like that for an eternity.)
Better get my endurance walking up to par: there's going to be a lot of ground to cover.