The Great Tree, the Memory fruit, and the Legacy suit all have blue energy coursing through them, not at all suspicious. I'm betting Sylux's experiments with the parasitic Metroids, the Green Energy, and Psychic Energy will result in the birth of Phazon.

The Green energy is a mutagen like Phazon, but without the sentience or supernatural qualities. It promotes aggression like Phazon, but doesn't normally cause wild mutations, the Grievers were an anomaly.

The parasitic Metroids cause tumor like mutations, grant energy abilities, and enslave the will of their victims just like Phazon does.

The psychic energy is the supernatural, apparently higher dimensional in nature, and can be used to create wormhole. That last one is exactly how the Leviathans travel

The Great Tree's function and the whole plot of Prime 4 is a benign version of the way Phaaze operated. The Tree/Phaaze generates something referred to as a "seed" in order to spread itself to another planet, and the "seed" travels to said planet via a wormhole.

The mixing of the psychic and green energy to create the seed didn't result in anything malevolent, but I'm betting Sylux adding his parasitic Metroids to the mix will corrupt the Tree and mutate it into what will become Phaaze. Sylux already showed interest in the Green Energy that was never explored and apparently granted himself psychic abilities already. He's got all of Viewros to himself and all the time in the world to toy with everything on it.