Love both movies Oh my god I watched The Hunger Games and Catching Fire before I saw Frozen and when I did see the part where Kristoff says "That is Mahogany" I'm like "OH MY GOD IT'S THE HUNGER GAMES." But I never realized the other similarities.
At the end of the movie all of them took the ships and were voyaging to find a new island to live on. She placed the shell there because there would be no future leaders on the island. (Still funny tho)