This also intrigues me. Again, a long shot, but if there was going to be, say, a crossover with the MC-2 universe, well, a collection of relevant stories might just be too much of a tip-off. Of course, again, it's entirely possible that I'm barking up the wrong Groot, as it were...
CLASSIFIED PRELUDE TPB
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Find out what's in store for the Marvel Universe in this definitive prelude to the next TOP SECRET event! You won't want to miss a moment of this major story — and it all starts here!
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I think you're on the mark regarding ASM #25, but I'm fairly certain that this second book is going to be about Secret Empire.