Board Thread:Warhammer 40k General Discussion/@comment-46.162.84.254-20130704080553/@comment-75.166.170.221-20140624003447

The Tyranids are defenantly a massive threat, many theories suggest that the Tyranids have barely even brought in 2% of their entire universal number. The Tyranids could have been a "galactic delete button" invented by the Old Ones before their disappearance since the Tyranids were supposed to target Necron tomb- worlds, and the Astronomicon is the one of the only things drawing the Tyranids away from their main objective.

There are multiple ways these Tyranids can be defeated, first for all that remains of the Necrons and C'tan to awaken. Second for the Imperium, the Tau Empire, And the Eldar to form a galactic alliance (which could be unlikely), and third, for the entire human race to turn over to Chaos and feed the Chaos gods and the Immaterium to be powerful enough to rival the Tyranids. The later might result in the decay and destruction of the human race in the great game. However the Tyranids remaining alive or all Necrons awakening would also end humanity. ;)

Basically the Tyranids, Necrons and Chaos are the strongest as of now, however the ancient Imperium of Man was also very strong under the Emperor. If the Horus Heresy had not happened, all alien races would be exterminated and the entire galaxy would be turned over to the Imperial Truth, the Chaos gods would be too weak to even create daemons. Eventually the Imperium would have expanded to other galaxies.