Kinda reminds me of the modified Primal fights they have for people at Fanfest where players get a T-shirt or such for winning.

Anyway I don't see SE spending resources on limited events that not everyone can participate in. My understanding is that the people at Fanfest are given preset characters to complete the fights. In game special events tend to be low level in ARR areas so even new players can participate.
The highest I can remember a special event going was the Lightning Returns event where the last chapter required your character to be in the low 40s IIRC.