Spoilers, ahoy, below the pic.
No idea if what takes place in today's issue of X-Men Legacy #259 has anything to do with the above "It's coming" teaser, but could be a strong possibility.
While last week saw the return of Johnny Storm to the Marvel U., this week sees another "deceased" Marvel charcter -- reborn!
"Ariel comes back in a ball of fire through a sword used to house the Phoenix Force."
This might be reference to the Blade of the Phoenix used by Korus, which lost its power during DnA's Realm of Kings, I believe.
Well, at least that's what Marvel Cosmic fans were given as to the reason Korvus and Rachel Summers (who also lost the Phoenix) departed.
Seems Marvel has been taking a 180 approach to their characters of late, as now they are actually coming back from the dead.
Bucky, Thor, Johnny Storm, Ariel; Not to mention Cable, and I suppose Nova.