Late June is after E3. That means that MGSV could be a victim of new game hype.
Whereas if the game is on schedule for early June ... surely you would just push harder to get a May 5th release date? V/V of 201V. That's truly a global release date, you don't even have to rearrange anything. Just push the team harder, Kojima, they can take it.
Yesterday I got the sudden urge to play MGS4. I went to Best Buy planning to buy the HD collection but they didn't have it. I didn't want to wait for Amazon, I wanted to play it now.
So I went to Gamestop and found a copy of MGS4 for $4.99. I put about 4 hours into it yesterday and it's pretty awesome. It holds up really well, other than the controls are kind of unfriendly. Still looks pretty great.