Game of Thrones Season 4 spoilers on Daenerys' grown-up dragon

Season 4 of HBO's Game of Thrones does not premiere until April 6, but the network is keeping interest high with well-timed releases of featurettes, trailers and more. This latest one is nothing more than a brief Vine video, but it shows off what could be a key development in the series.

The clip, which lasts only a few seconds, shows one of Daenerys Targaryen's dragons, which has now grown significantly from the baby dragons we saw in previous seasons. In the video, the dragon rises above some poor, unfortunate soul, who looks like he is about to get eaten, roasted or maybe both. The shot comes from one of the trailers for Season 4, but this video offers a longer look at the beast. Check it out below:

The latest trailer offered some new footage for fans to enjoy as they wait (im)patiently for the premiere. This newest full-length trailer, which you can view below, contains teases for plenty of new developments in Season 4, including:

- Arya Stark swears revenge on the Lannisters.

- Daenerys Targaryen promising to rule as a queen and marching toward another city.

- Jamie and Cersei Lannister back to their old tricks (kissing) again now that he is back in King's Landing.

- Sansa Stark still reeling from the events of the Red Wedding.

- The White Walkers make an appearance at the end of the video.

What do you expect from Season 4 of Game of Thrones? How do you think Dany's grown-up dragons will factor in to all the madness on the show? Let us know your thoughts in the comments below.