I don't recall seeing such a caption box in my digital copy of the comic, and comiXology seems to be having log-in issues so I can't check the issue.
In issue 26. The gorgeous double-page spread of the Phoenix Force ripping through the team in the bottom right corner, just below the caption box with Beast reporting that "We completely failed in our mission."
It's in my print copy at least.
: Actually, I CAN see where the confusion comes from-- the story actually reads in this
26, up until the above mentioned double page spread, then Secret Avengers
26-28, then back to Avengers
26 and the double page spread and the rest of the story.