Arrowverse: 10 Implications From Crisis On Infinite Earths
7. The Justice League Is Formed
After defeating the Anti-Monitor for good, Barry decides to form a version of the Justice League for the heroes of the Multiverse to gather should they face any Crisis-level like threats again. For now, the League consists of Superman, Supergirl, Martian Manhunter, The Flash, White Canary, Batwoman and Black Lightning. And as another little touch, there are seven seats with the insignia of these heroes.
This would make things convenient in the future, considering that all of the heroes in the League are living together on Earth Prime. There is also one empty seat in between the Flash and White Canary, which is left for the Green Arrow.
That is a fitting sign of respect and honour to Oliver Queen, who sacrificed himself to create a new Multiverse, indirectly contributing towards the formation of the League.