If you watched the last few movies, you would understand that this is a progression from the last. And also obtuse also means slow to understand, which is what ZeonChar was saying

Have you paid attention to any of the Avenger’s movies? They all have the Infinity Stones in them. Loki’s scepter, the stone in Vision’s head. Also Falcon and the Winter Soldier are from Captain America 2. It’s like you haven’t even watched these movies.