2012's Battleship has a post-credits scene that paves the way for a potential sequel. Based on Hasbro's board game of the same name, Battleship primarily revolves around a slam-bang nautical showdown that ensues when an international fleet of ships finds a destructive alien armada in the middle of the ocean. While its over-the-top marine action and one-dimensional narrative were not received too well by critics, and even its box office numbers were a letdown for Universal and Hasbro, Battleship proved to be an entertaining logic-free popcorn flick that offered what it promised to audiences and concluded on a predictable but satisfying note.

https://screenrant.com/battleship-credits-scene-explained/