Comic fans, what's the story on Janna the Jungle Girl vs. Shanna of the Jungle?

So, I note that Frank Cho has a new comic coming out called “Jungle Girl” featuring a heroine named Janna. And I know that Cho was hired to do an issue of “Shanna of the Jungle” prior to that. I sense a potential story of broken promises and hurt feelings and so forth here. Or it could be more prosaic. But I figure some of the folks here would know. So, spill already, don’t make me haul out that TV magic chick to read your mind.

The TV magic chick of course being Zatanna.

I’ve heard nothing.