Hero of Pizza
The Mossdeep Space Center has discovered that a gigantic asteroid is on a collision course with the planet. The asteroid's existence appears to be connected to an event that occurred 3,000 years in Hoenn's past, an event that's also been said to have connections to Mega Evolution. Throughout it all a mysterious young woman named Zinnia bears a certain destiny that will be the key to the fate of the world.
Many key characters and events have been revealed to take place within the Delta Episode. Note that this is still preliminary information and much of it is vague at best.
Save the planet from a giant asteroid!
It would appear that the massive asteroid on a crash course with the planet is at the core of the Delta Episode's plot. According to sources you'll need to travel around the Hoenn region in order to learn the secrets behind the asteroid's appearance and prevent the monstrosity from ever impacting. As noted previously, the asteroid is somehow connected to an event that occurred 3,000 years in Hoenn's past. The Mossdeep Space Center will play a central role in this part of the plot, as will the guidance and aid of Steven Stone.
Wallace will also be making a return appearance for the Delta Episode, though in what capacity has yet to be made clear.
Team Magma and Team Aqua run amuck over Key Stones
As if the impending doom from above wasn't enough, it seems that Team Magma and Team Aqua decide it to be a fine time to start hunting down Key Stones and stealing them from Trainers who possess them. You'll have to deal with Magma Admin Courtney or Aqua Admin Matt based on the version of the games that you're playing.
Mega Rayquaza and Deoxys clash - in space!Mega Rayquaza into space. It doesn't get much better than that.
Zinnia, a young woman of mystery and destiny
Likely the most mysterious element of the Delta Episode, Zinnia's role is one of great importance indeed. Her origins and true identity are shrouded in secrecy but she alone is said to hold the key to the fate of the world. Described as a girl who wears a fearless smile, Zinnia will challenge our hero's thoughts and ideals throughout the story - seemingly even more literally, too.
Zinnia is often found traveling with her Whismur companion, Aster. She also bears a Key Stone within her Mega Anklet to Mega Evolve her Salamence into Mega Salamence, which she uses in battle.
What are Zinnia's true aims and goals? Hopefully they're to aid our heroes in saving the world. We'll just have to wait and see. Check back in the coming weeks, once we've actually had the opportunity to play the Delta Episode for ourselves, for further details!