Graves remit isn't selecting the England team - that's what they have selectors for. Clearly he has an agenda for reigniting the KP debate, though by any stretch it was galactically poor timing. He can of course appoint different selectors/coach/MD (if that job survives the streamlining) who may want to get KP back in, but until he does KP ain't getting anywhere near the England team...
I'm not sure he'd walk in at the moment anyway. He didn't make a difference in the 5-0 Ashes and hasn't played anything more than 1 day cricket in 14 months since. By his own admission there's no guarantee his knee will stand up to test cricket either. It would take a brave man to drop a guy averaging 60, Bell, admittedly, needs to produce before the Ashes and the rumour was that KP was a negative influence on Root during the 5-0. England seem to like the idea of an all rounder instead of 6 batsmen so for now there's no place available.
If he's the KP of 2012 or before, I'd pick him for the NZ series. If anyone can guarantee he is. If not, he'll do very well to get in before mid-Ashes and it will have to be replacing someone who is under-performing. Even then, would you pick him rather than, say, Lyth to open and Trott to move down (assuming Bell, Ballance or Root are having shockers)?
Cook also came out today to say that he doesn't think KP will ever get back in (sub text, not on his watch) and I just don't see him getting back, being realistic. His age, book, knee, burnt bridges and liklehood that he's past his best just doesn't shout recall to me...