It's true, if you look at the latest TW@B you can see the Iron lords ship indicated by the insignia at the back and the leaves on the wings. But does that ship look familiar to anyone? ITS THE ARCADEA CLASS JUMPSHIP YOU GOT AT THE BEGINNING OF THE GAME! That's right, bungo is using YOUR FIRST SHIP as an achievement to get during rise of iron. They're also going to be reusing many of the sets we've been on and the plaguelands have got to have been there since vanilla as part of that 'playable geometry' they showed us in E3 back in '14 because that section was clearly outside the wall and thus, in the plaguelands. Here is all my lack of evidence to prove irrefutably that bungie is lazy and is just reusing even more content.