Lex Luthor is all about Lex Luthor, double cross everyone!
I honestly thought Blue Beetle was having a hero complex, till the very end that was.
Side note, didn't realize it until after watching season 2 again, Mal and Bumble Bee Girl were Superboy and Miss Martian's classmates.

I'm a little indifferent Like how they had Slade in Teen Titan's... about the way they introduced Static but every story has its version I guess.

Also regarding the show being cancelled, it is sad, as it does have great character development for a show that has multiple cast.