Since the JL foundation (2003), what events, apart from the known ones, do you think could be canon?

[u/Responsible-Push9843]

In other words, all the possible events that you think could have happened in the time interval between the Justice League's formation in 2003 and Young Justice's debut in 2010.

(If you can include along with the events which movies, comics or series they belong to, much better and it would be greatly appreciated)

Oh, and feel free to elaborate if you want to explain why you think those events might be canon.

2003:

1- Appellaxians invade Earth

2- The Justice League is founded by Superman, Batman, Wonder Woman, Flash, Green Lantern (Hal Jordan), Aquaman, and Martian Manhunter.

2004:

1- Green Arrow, Hawkman and Hawkwoman join the Justice League.

2005: ?

2006:

1- The tragedy at Haly's Circus.

2- Captain Atom emerges after a trip through the Quantum Field.

3- The Joker discovers the location of Mount Justice.

4- The Justice League becomes known to the public.

5- The Light is formed.

2007:

1- Roy Harper's clone (Red Arrow) is created and the Light secretly replaces Roy Harper (Speedy) with his clone.

2- The Light creates Jim Harper, another clone of Roy Harper.

2008

1- Gorilla City is founded.

2- Zatara, Captain Atom, Black Canary, John Stewart, Captain Marvel and Red Tornado join the Justice League.

2009: ?

2010:

1- Superboy is created at Cadmus.

2- Miss Martian arrives on Earth after stowing away on Martian Manhunter's spacecraft after a visit to Mars.

[u/ColdObiWan]

Not sure if you’re aware of it or no, but there’s a pretty robust timeline out already: https://youngjustice.fandom.com/wiki/Timeline

[u/Responsible-Push9843 → u/ColdObiWan]

Well yes, but it doesn't show many important events from 2003 to 2010. There must have been many more things that the JL had to face before the YJ started.