If Geelong don't win the flag with Danger then they undoubtedly lose this trade.
That's a bit like saying we've lost the Thommo trade so far. Pick 13 and a mid 2nd rounder for a top 5 league wide player is a win whether they win a flag or not. If they can't do it with Danger, then Milera and whoever went at the other pick weren't going to do it. Having Danger gets them closer to it than those picks would.
They won the trade, it's not even in question.