I think it would be fun to have an elytra PvP arena, where players use elytra and bows and arrows. Until you kill the other player or get killed, if you land, you are teleported back up into the air, so that you can't snipe the other player from the ground. This would be very interesting and would add a very unique experience that is not offered on very many other servers, if any. These battles would take a very long time and it is a completely new skill that many players have not tried yet, but it would still be a fun thing to be able to do. Also, Minecraft PvP is not very interesting and I have seen some players say this, but this requires a lot of skill and will help with any kind of PvP because it will require a great amount of coordination and accuracy. However, elytra do break fairly quickly especially without Unbreaking III and Mending, so maybe until they leave the arena, they are supplied with an infinite supply of fireworks and an unbreakable elytra. Because of the commands that will probably be required to do this, players should be asked to clear their inventories before entering, and maybe they should also be supplied with an unbreakable bow and arrows. This will also make it so that it relies on almost pure skill, a little luck, and no items that new players can't get yet. It may not be popular at first, but it might once players get the hang of it. I hope you consider this.