Honestly, I don't think Thorpe will be getting anything in 2013 and shouldn't get anything for 2013. They just got Swarm, a massive investment and I think it would be smart just to continue advertising that it's the new ride throughout 2013 like how Knott's advertised Pony Express as the new ride for multiple years.
However am I right in saying that according to the MTDP that there will be a medium instalment this year:
2009 - Saw The Ride (Major investment)
2010 - Saw Alive (Medium investment) rethemed Thorpe Bell.
2011 - Storm Surge (Small investment) relocated from Cypress Gardens
2012 - The Swarm (Major investment)
2013 - New Flat Ride (Medium investment)
So this may suggest that there is a new ride coming next year? It all seemed to be pointing that way when the old Jungle Sufari was being fenced off but after no development through the season, it seemed like that theory was no longer possible!
Going back a bit now, when the swarm was released the original plans were to have a follow up ride coming in 2013 and after the now succes of Nemesis Sub Terra, rumours began that we would be seeing a N:ST style ride making its way to thorpe park!
But then, in the summer, The London Dungeons submitted plans for it to be relocated to near the London Eye however, theese plans did not include vengeance the recently opened 5D ride!So once again rumours began that the ride will be relocated to thorpe park. But then after many posts of debate, it came to the conclusion that it was not being relocated due to the low throughput and the unreliability!
So what is coming in 2013?
Personally, I hope that the following things will be done:
1) Colossus Repainted
2) Saw Alive Reopened
3) Storm Surge Station rebuilt and more scenery added
4) X://No Way Out re themed and the queue line to be indoors
5) General clean up on most rides
So, I think that there will not be a new ride coming next year but hopefully, Thorpe park will respect the ones they already have!