I totally missed doing anything for Christmas here on Giant-Size Marvel, but this illustration fits in nicely.
Marie Severin did this one for Marvelmania #6, way back in 1970. Featuring her zany interpretation of all the Marvel heroes exploding out of a Christmas present. Note that Conan the Barbarian is leaping off the left hand side! Apparently this issue shipped just after Christmas--they missed their deadline and so did I. Nuff Said!