My Predictions:
Merlin: There is a gearset that spins inside Invisible Merlin's translucent tender and the spikey wheels turns that mechanism, His gear car will also have it's own wheel driven spinning gear animated action.
Thomas: His First truck which looks like a steel pouring vessel has spikey wheels and has some sort of spinning or tipping animated action.
Hurricane: Both his cauldron trucks appear to have spike wheels and will probably have some sort of spinning or tipping animated action.
Merlin: There is a gearset that spins inside Invisible Merlin's translucent tender and the spikey wheels turns that mechanism, His gear car will also have it's own wheel driven spinning gear animated action.
Thomas: His First truck which looks like a steel pouring vessel has spikey wheels and has some sort of spinning or tipping animated action.
Hurricane: Both his cauldron trucks appear to have spike wheels and will probably have some sort of spinning or tipping animated action.
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