Hi Amegus!
Sounds like a great idea! Keep in mind that for much of Warcraft’s content you’re able to group with others cross realm, so perhaps you wouldn’t even need to restrict things to Ragnaros!
Feel free to make a second post here if you think that’s something you’d like organize 
Being a guild leader and organizing things for others to bring people together is an admirable thing to do, so thank you in advance for helping your fellow weekenders!