Merlin have filed two intriguing trademarks recently; 'Chronicles of London' was filed on the 23rd March and 'Automatons' was filed only a few days ago, on the 8th April. They have similar classifications to The Smiler's trademark, which would suggest that they are looking to use the names for attractions and merchandise.
Now there is obviously the suspicion that one of these will be the name of Thorpe's 2016 attraction, and with the codename of Project Whitechapel, 'Chronicles of London' could be seen to fit. Whereas 'Automatons' has a few extra classifications and is a name which could lend itself well to some sort of ride vehicle. However, Merlin have stated that there is new midway brand/attraction in the pipeline, so it is possible that either of these may be the name for that. It has also been established that Merlin have purchased the .co.uk and .com domains for 'chroniclesoflondon', which could be to set up a minisite for the 2016 attraction or a website for the midway attraction. Of course there's also the possibility that these names will be for attractions we aren't aware of yet, so we'll just have to wait and see...
At the moment this only add to the speculation, but neither of these trademarks seem to allude to an IP so we may be seeing an original concept next year. You'll be able to find details of the trademark applications on the 3rd page
here.