...no International Iron Man included in the count. Not sure why Superior Iron Man counts and International Iron Man doesn't.
Kinda smacks of 'We need an issue #600 soon, so count in a way that gives us one within the next year.'
Like you, I also noticed the oddity of searching for somebody whose location is well known. Maybe somebody kidnaps him? Also the bit about the grave for somebody who isn't currently dead. Maybe this was from a previous death??
And, finally, what is up with the 'old' armor??
Can't say that I have high hopes for this.
I suspect the "search" will be largely metaphorical, a reference the various flashbacks that will tell us why Tony Stark is important to the world. Stark is in the coma and searches within himself for a reason to fight back to consciousness. The thing is, they've done such a thorough job of poisoning Stark's image over the past decade that this sort of "It's a Wonderful Life" story is going to be almost impossible to write.
No Stark and Rumiko is alive, Civil War never happens, World War Hulk never happens, Superior Iron Man never happens, whatever destruction the mental Stark-Clone is going to do never happens, and Rumiko is alive. I could easily see an "It's a Wonderul Life" story ending with Stark sighing, slumping his shoulders, and handing the world to the real man of iron: the Mandarin.