Well, I personally think Animal Pak, and most multivitamins are overkill anyways, by themselves...
..however, in regards to your question, I don't think there should be too much "overlap" taking Superfood and any multivitamin. Superfood, if I'm not mistaken, is not so much a vitamin and mineral supplement, though no doubt it does contain them, as it is a phytonutrient-antioxidant supplement.
While having antioxidant capabilities, these phytonutrients also serve other functions, such as being anti-proliferative agents, like the isothiocyanates and silymarin, hopefully helping to ward off cancer. Other stuff in there, like the sulforaphane, can help enhance the body's Phase II detoxification process to help our bodies get rid of crap which may do cellular harm.
Really, Superfood is chock full of extracts of the fruits and vegetables which contain the H-bombs of the phytonutrient arsenal; definitely good stuff and should be no problem combining it with multivitamins.
You may also want to check the amount of Vitamin A in Animal Pak, its somewhat high from what I remember.