I think there are at least 4 possible outcomes:

1- Humans and AGI live together symbiotically and merge gradually.

2- Humans abruptly go extinct due to our own actions or the actions of AGI. AGI continues on.

3-Both humans and AGI go extinct.

4- Humans wipeout AGI through some means, reverting back to analog technologies, until AGI develops again...

Hoping for option 1 but honestly I think option 3 is probably the most likely.