More reports are surfacing from Comic-Con last weekend in which a trailer of Goblet of Fire was shown to those in attendance. A few of the items shown were Cho Chang, Mad Eye Moody, Sirius’s face in the fire, the Durmstrung ship arriving, Wormtail and the Quidditch World Cup.
From Dark Horizons:
The trailer was then played to a very enthusiastic response. A lot of stuff was shown off - a glimpse of the Quidditch World Cup, scenes from the various tasks, Cho Chang, Mad Eye Moody's roving eyeball in action and his explanation of the Avada Kedavra curse, Dumbledore pulling a silver memory thread out from his head for the Pensieve, the Yule Ball in full swing with Hermione dancing with Victor Krum, and glimpses of the Tri-Wizard task member names being called along with Potter's name being yelled out rather nastily by Dumbledore.
There was also the arrival of Durmstrung's ship through the water of the Great Lake, Sirius's face in the fire (its actually talking ash and embers), Wormtail conjuring in a cauldron, and an ultra quick glimpse of Voldemort in pre-cauldron form (and his snake) along with the Dark Mark. Its a great preview that will hopefully be finished soon (a small number of shots were animatics, others were obviously not complete), and looks a lot more epic than any of the other films in the series. This will be brilliant.