These are the seven cards included in the Specialty Hobby version of Marvel Fluxx. If you bought your copy at a mass-market store, and it doesn't have the yellow starburst, these are the cards you're "missing."
Note that if you have Cardinal's first printing, you may have the wrong corner-rounding/cardstock to match these cards. They have assured us that they will take care of replacing decks for people who want to be able to add the extra cards in. https://www.spinmaster.com/customer-care-form.php
The cards in this set are: Keepers: Miles Morales Nick Fury Phil Coulson
Goals: Spider-Verse Avengers Assemble Agents of S.H.I.E.L.D. Captain America's Biggest Fan