From the Marvel Masterpieces series there is a lot of duplicated art. Below is a listing of what I have found so far. MMI stands for Marvel Masterpieces Series 1, MMII stands for Marvel Masterpieces Series 2 and so on.
MMI #S3 of 9, MMIII #44: Venom
MMI #S8 of 9, MMI #71: Sand Man
MMI #X4 of 9, MMII #13: Cyclops
MMI #21, MMIII #MK 4: Dagger
MMI #42, MMIII #MK 6: Iron Fist
MMI #48, MMIII #23: Kraven The Hunter
MMI #58, MMIII #MK 7: Moon Knight
MMI #70, MMIII #35: Sabertooth
MMII #48, MMIII #24: Magneto
MMII #1, MMII #38: Iron Man
Also, MMII #56 Nick Fury is actually the Punisher.
“It’s a recycled image. They used the same picture for the header card as they did for the Iron Man card. On top of this, Nick Fury’s card has a picture of the Punisher, Enchantress’ card has a picture of a green version of Scarlet Witch, Archangel’s card has a picture of Angel, Hammerhead’s card has a picture of Tombstone, the Cyclopse card has the same art used for the Cyclopse chase card in MM07, and a number of the chase cards reused images from the base set “–http://scoundrelpublishing.com/spart/viewtopic.php?p=147993#147993
