So, in this past week I have seen both Captain Marvel and Shazam! Hence the title there. If you know your comic history, you know that the heroic protagonist of Shazam! takes on the name Captain Marvel, a deliberate choice by his creator’s to stick it to Marvel comics at the time. There’s a lot more history with that which went bouncing back and forth, but there are comic historians who’ve delved into thatparticular legal and trademark battle and produced write-ups