After five years without big investments - there was only one major ride in 2013 ("Tanzender Pavillon") - Belantis built some multi-million-Euro-attraction for 2015. A few weeks ago, there was a big (I believe faked) voting on a digital newspaper and after one week there was 45,3% for a new roller coaster (pic 1) and 45,1% for a new water ride (pic 2).
So, Belantis said they will see what is possible, so, the most fans in Germany believe it will be an new and unique water-coaster-experience, because for the new main attraction there will be "only" three million Euro.
source with third possible voting (ferris wheel) >> http://airtimers.com/belantis-attraktion-2015/0026789/ -- and other updates >> http://airtimers.com/was-ist-losim-belantis-freizeitpark-bei-leipzig/0024291/ http://airtimers.com/belantis-attraktion-2015/0026789/