Will the announced MOD theme be on this page when the event starts?
No, A new thread will be created called "THAC XVII starts now" with the Theme, Mod elements, and other information. A link to that thread will probably be posted in this thread, and you can ask questions and discuss stuff there as well as in discord. There is also usually a thread that lists voice actors and their availability, and you can contact them through private message, or in the discord chat.
“But the enterprise in which I’m about to embark on is fraught with imminent peril.”