As much as fans want to be surprised for what's going to happen, the web is full of interesting theories and spoilers for the upcoming and much-awaited "Game of Thrones" season 7.

According to one interesting theory, which might be revealed on the finale season of the series, Tyrion Lannister is a true Targaryen.

On a video posted on Facebook on September 7, it reveals that the reason why Tywin Lannister always hated his only legitimate heir, Tyrion who could carry on their family name, was not because he was the reason why his mother Joanna has died after giving birth to him, but because he was not his son.

Furthermore, the video illustrated and gave meaning to why Tywin wants Tyrion killed despite being his son. Tyrion was believed to be the son of Aerys Targaryen and Tywin's wife Joanna as Aerys is known to be infatuated to Joanna.

It was explained that Tyrion was a true Lannister because of his ability to control dragons. This was shown on last season 6 wherein Tyrion freed Daenerys' dragons without ending up burnt.

Interestingly, the video added that Tyrion Lannister is the legendary Azor Ahai, the reincarnation of the ancient warrior, whose returned has been told on prophecies.

According to the prophecy, Azor Ahai must be a Targaryen. He will be born again amidst smoke and salt, in which "The Battle of Blackwater" episode was related to Tyrion's reborn as a great warrior.

Since there were no official reports confirming this theory, some fans are also speculating that Azor Ahai will be either Daenerys or Jon Snow.

Meanwhile, "Game of Thrones" is known to feature at least one great battle in each season and for this series finale, Watchers of the Wall claimed it will be battle at the sea wherein Yara and Theon Greyjoy will go against their uncle Euron, who is also reported to be teaming up with Cersei Lannister hoping to gain more power and control over the seven kingdoms.

Watchers of the Wall also reported that the "Game of Thrones" season 7 filming started at Belfast, Ireland.