Considering most people who were hoarding green keys used most/all of them when green crates were released, and green keys are incredibly time-consuming to get (Seriously, you could ride for hours and still not get one), it looks like sparrow suit will be incredibly scarce. Hopefully they leave it in the crates for a while AND open up some other way to get keys.
I hate how they insist on making an item super rare just because it was super rare in the original. It's a different game, we can have original ideas and different values for items..