"Something big is happening. Disaster Transport & Space Spiral will be dismantled this season to make space for @!!$!(*%%. We're sad to see them go, but are excited as we fly into the future. Stay tuned for more!"
The "@!!$!(*%%" in that quote is rumored to be a new Bolliger & Mabillard wing coaster, that would debut for the 2013 operating season. Judging by the phrase "[we] are excited as we fly into the future," the rumored wing coaster has been green-lighted. They are going to release new details later, which will confirm or deny these rumors.
It was announced at CoasterMania that Disaster Transport's last operational day will be July 29, 2012, yet there is no word on Space Spiral's last day of operation. So if you'd like some last pictures or rides, you should make it to the park before that date.