What if DC made Martian Manhunter a villain?

[Lee Stone]

How would you react if DC made J'onn J'onzz a villain?

Pause.
Now continue...

Imagine the following:

DC proposes the idea that Mars is not dead, and that all the inhabitants have either turned invisible or have shape-shifted into rocks or space-debris.
A writer gets the idea 'what superhero would call themselves a 'manhunter'?'
The Martian Manhunter that rejoins the League shortly before the Detroit era wasn't J'onn, but rather an imposter who, acting as a soldier for Mars, is sent to gather data on the superhero community.

The Detroit era becomes the perfect opportunity to infiltrate the League because no one on the team really knew J'onn.
By the time the Big 7 are reunited in Morrison's JLA, the imposter had been J'onn so long that everyone believes him to be legit.
Meanwhile, the imposter J'onn got to experience the Detroit era, the JLI era and the JLA era.

While on his mission, he implants an alien artifact into Gypsy at the end of the Detroit era and then 'controls' Despero to hunt her down three years later and lead her to him so he can retrieve the device. The device gives J'onn the information he needs for the Martians to replicate more powers. Yes, this makes J'onn responsible for the deaths of Gypsy's parents. He also 'controlled' Professor Ivo and made him kill Vibe and Steel.
He chose not to have Vixen killed because he had feelings for her.

Unknown to the Leaguers, J'onn had also been recording their thoughts and transmitting them to Mars every day since his return before Detroit.
All their secrets are known by the Martians.

A major event kicks off when J'onn finally reveals himself as he kills Nightwing (the writer is pandering to Didio for a bigger chance to get green-lit).
During the event, the true J'onn returns and much of the remaining JLI and New Teen Titans characters are killed off.

If this sounds horrible, keep in mind that it's also very plausible.
This could happen at any time due to the current think tank at DC.

Think of this post as an exorcism.

DC trembles at the thought of readers knowing how something ends or the secrets of a story.
So much that they will force a writer to re-write an ending, even changing the villain's identity at the last moment.
I'm hoping that by posting this, I've helped nudge the negative energies at DC away from the idea of using J'onn as a master villain and ruining the heart of the JLI and Detroit eras.

Note: this post was also inspired by a dream I had last night.