To be honest I think the next largish thing will be 2012 rather than 2011 at Drayton. The Olympics will mean that the UK is centre spotlight, so all wise businesses will be trying to 'shout' their names and drag the visitors to them.
I'm pretty convinced that Thorpe will be getting something huge. I feel Alton wont need to get anything big, its already globally known. So if DM can afford it it would be wise for them to get something more UNIQUE than a clone of blue fire. I think to pull the crowds it has to be a worlds first of some sort, which might be hard for a little park.