From Halopedia, the Halo wiki
Using angled brackets would screw around with the link coding, plus the names in the preorder pictures used a unique font. Let's wait for a bit (probably by tonight) before we change anything. And HAZOP is done.
I would say his first appearance would be in First Strike. But then again, it depends on what is mean by "first appearance". I suggest talking to Jugus or someone who is active in the Appearances project.
As long as its an incredibly accurate upscale, then I see no problem. You'd have to get it approved of course. Also, if 343i doesn't release an HD render of the new UNSC emblem, would you mind if we used yours?
You can send it here (the only way for people to contact me). If you don't want others to read your message, mark it as private.
I've set a protection on it that last for a week. Until then, keep it in a notepad or in the talk page of the article.
Also, note that it really doesn't matter who added it first. There is no "first" competition in Halopedia. So, people take credit for saying it first? Does it really matter? Do they actually gain something useful in their life for being first in getting information about a video game out (unless they're doing it for a living, then that's a different story)? It's a bad habit and simply childish/amateurish/immature. Instead, take the better approach by taking the "So, wut?" way.
My apologies, but I didn't read your message fully as I saw there were Primordium spoilers, and I'm currently in the middle of reading it. You'll have to bring your inquiry to someone else for now, sorry.