Welcome back to the wiki!
In response to your question on the Wiki gold project page, you can certainly upload the product/merchandise images. I'd just put [ArenaNet Image] (since it certainly contains Images owned by arenanet) for the licensing option and [Category: Merchandise] if you feel like it. If you feel more author credit should be given, you can add that in the gallery as gallery text, or add it as a note and someone else can. --Rain Spell (talk) 08:15, 7 September 2017 (UTC)