Just a gentle reminder, you have to include links. Noone is helped when you just at "Justice League of America" or "Nate Heywood" in the infobox (and spell them wrong to boot). Regarding your edit to Lucas Fox (War), including only ONE random link is not appreciated. If you can't be bothered, then don't include links at all, because with just one link, it doesn't show up in Category:Wikify.
Another general, stylistic note is that history sections have to introduce the character by name, and carry some structure. Not one big block of text. Clear structure: intro, white line, early life, white line, basic events in the movie. If the paragraphs are long enough or if sections require more than one paragraph, include headers.
When you write a character bio, you have to include links to other characters, events and places. And please do not include speculation. Much of your John Wilkes Booth bio was never shown in the episode.
A character bio is a general overview of the character history with a clear introduction to the character followed by sections on youth/origin and exploits. It shouldn't be an elaborate play-by-play of every word, punch and kick. That's more something for the movie synopsis. Conciseness is key.
You added that origin before, and it was removed back then. It was removed now. It will be removed if you add it again, and you will be blocked. What you add is information for which you have no idea whether it counts in the TT version.
Its really very easy. On the speaker line, type the character's full page name. If you want to put a quote from Anarky, write "Lonnie Machin (Beware the Batman)". To link to him and show his alias, type the link like this [[Lonnie Machin (Beware the Batman)|Anarky]]. Try it out.