There's some ambiguity and duality here. Tone down the emphasis on "favorite" templates; otherwise, you'll end up trying to combine everything at once, resulting in a choice that isn't really a choice. Furthermore, if the tournament includes a stage for discussing the rules, it makes sense to make the decision about registering for the tournament after the rules have been approved. In other words, the player should definitely know what and how things will be.
I was planning to play in the Tower event. But as for the templates... What's the point of playing with templates you don't like?
In the end, the templates will be almost the same as in the previous "Favorites" event, so sign up! Otherwise, there will only be one Tower slot available :(.