A WPvP community would be much easier to get going than a guild, but we need both! You could potentially recruit for your guild from your community as well. Maybe others will have feedback about starting guild on a low Horde pop realm tho… but potentially more Horde WPvPers on Outland, no idea… hopefully members willing to realm change anyway.
Ofc do what you want, but I suggest you just go ahead and create the community, so easy to get set up. Here’s some suggestions for setting up a WPvP community. Main thing, make sure recruitment link is set to never expire.
I’ve added this post to my list of wpvp guilds and communities. Let me know when you have an official name for guild/community so I can update my list.