You must really have a lack of Star Wars knowledge. Boba was never a space cop, he had a Slave 2 that was a police vehicle. He and 212 MAndalorian warriors are Protectors of the world known as Mandalore. This happened during the Clone Wars, and is still continuity.
Corusant is 25 thousand years old. You making something out of the line, "I will not let this Republic that stood for a 1000 years." Already fixed. After the Sith War between the army of light and darkness the Galaxy and republic were messes up. A new republic was born and it was we see a 1000 years later.
So there is continuity, everything is EU besides the movies. The Valley of the Dark Lords is the same in TOTJ as it is 4000 years later. So the Valley is just wrong. There is no continuity with that Valley. The Valley of the Darklords is establised in TOTJ and JA, KOTOR didn't make the cut.
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Give it up allready, this topic is about Korriban not about incosistancies in EU and films, if u wanna talk about that start your own thread. There you can cry as much as you want about the valley not being the right one!