Opinions on what the heck this could be?

[destinduck]

That bill tells me she has muscovy in her for sure. Muscovy x mallard Im betting because of the real orange feet

 

[Mike Winters]

looks like some blue swedish because of the grey on the feathers

 

[bemba]

If she doesn't lay eggs than I'd say that she was a runner x Muscovy but if she lays eggs than she can't be a cross with a Muscovy as it would be sterile.

Female Hinnies (Muscovy mother, mallard derived father) lay eggs, although they do not hatch, females hybrids from a Muscovy father mallard derived mother (moulards) do not lay eggs at all.