I'm just confused as to how that would mean the scene is on Yavin.
I'm just saying the 1st Death Star was destroyed at Yavin. Maybe the trailer scene was in Yavin, not Endor. Maybe the ruins we saw in the trailer were from the 1st Death Star at Yavin.
Yavin looked a lot like Endor too, in New Hope. Only less trees.
Edit - plus, the 1st Death Star was a wholly completed station, so the chances of big chunks of it surviving a crash through the atmosphere is more likely than bits from the half-finished Death Star 2 at Endor.