The President wrote:
Actually, I don't think that's true. Tony Stark used the Phoenix energy signature he found on Nova to map the Phoenix's trajectory. It stands to reason that he knew the path the Phoenix took went through existing planets.
Well, since Dark Phoenix was only known to kill one planet (and that was just a bi-product of super-nova'ing a sun), I think it would be a wild conjecture to assume that the Phoenix was killing inhabited planets on it's path. I can see Tony thinking that... and he'd be RIGHT but it's still all assumption without any proof and all based on the warnings of a random Human Rocket that no one has ever met before and made his debut Earth appearance (as a Nova) by smashing into New York City, right through the Chrysler Building, and I'm guessing causing more than just property damage.
I'd really like to know why the Phoenix Force is suddenly pretending it's Galactus. That seems to be a massive rewrite to what was previously a mostly benevolent Force that kind of stayed out of trouble and out of the spotlight. Hopefully that's explained somewhere during this event.