Alright so here is what is in the eggs (According to youtube lol)
10km: Aerodactyl, Lapras, Snorlax, Scyther, Electrabuzz, Magmar, Hitmonchan, Hitmonlee, Onix, Jinx, Psyduck, Mankey, Eevee, Pinsir5km: Pikachu, Mankey, Porygon, Vulpix, Paras, Sandshrew, Ponyta, Rhyhorn, Ghastly, Horsea, Staryu, Cubone, Goldeen, Poliwag, Koffing, Magnemite, Drowzee, Slopoke, Meowth, Tauros, Ponya, Nidoran M, Diglett2km: Squirtle, Bulbasaur, Chamander, Pikachu, Jigglypuff, Eevee, Rattata, Zubat, Magikarp, Pidgey
bolded the more interesting mons for each egg