User blog comment:CNBA3/Fairy Tail Movie 2 Ideas!/@comment-4829046-20131017035712/@comment-1359322-20131017111950

No, Gajeel only attain the Iron Shadow Mode because he couldn't defeat Rogue that was taken over by his Future self. If Future Rogue didn't take over Rogue's body, Rogue would have admitted his defeat to Gajeel in that fight.