What is the post-credit scene in Quantumania and its implications?

Quantumania features two post-credit scenes. The first showcases a council of different Kang variants discussing the death of the Quantum Realm Kang and the threat posed by the Avengers. The second scene shows Victor Timely, a different Kang variant, preparing to address a crowd in the early 20th century, teasing his future involvement in the MCU timeline.