>>23015798Arceus will not acquire or shall ever have a Mega Pokemon Form.
Instead, it will be an alternate form. The man's necklace is a big hint along with how Hoopa transforms. Arceus's ultimate power will be unleashed when the tablets come together as one and the necklace releases a latent power that combines the rainbow like orb into Arceus. Arceus then transforms into the Pokemon God and will be in the games as the most, and never to be surpassed, form of all time.
To explain the power it will need a bracket above even Mega Rayquaza.
Arceus will be much like the Shadow type with resistances and have no weakness except for a mystery move that can remove the stones that will be implemented in the game on specific pokemon. This way Arceus has a 'check'.
Anyhow. Instead of Shadow, it will be of God's light, or of Holy light. Arceus will become the Creator of all in its full glory for all to see to defeat the Djinn of Terror, or the Djinn of Eternity: Unbound Hoopa.
You'll see an epic clash between God and what will be presented as, '' The destroyer..'' much like Yveltal only on a scale much larger.
Be ready.
I hope you enjoy your movie and this spoiler.
I look forward to your surprised expressions when this is confirmed 'officially' and that you will look back, pissed that I gave it it away but also amazed that this was the truth and entire plot behind the new movie and Arceus awakening to handle a power no other pokemon could. Not to mention the warring pokemon of Time, Space, and Dimension versus the Earth's ''Guardians''..
I hope you like it.
Until next time,
Insider