I will admit to being torn on the idea of 40-man raids... on one hand I'm excited because I've never been really active in these large group raids beyond city raids in WoW and the like, but I am also nervous/wary of the prospect that comes from managing 40 people's schedules so that raids can clear content. One way that I think would be a really cool way of at least ameliorating the tentativeness of large raids to guild leaders is by implementing a robust guild alliance system so that multiple guilds (perhaps as many as 4) could combine forces in order to take down these massive encounters. Why do we need this? Well, by officially recognizing alliances, the onus of being "world/realm first" becomes less of a concern. Now instead of worrying about whether or not the kill is considered a "guild kill" (in WoW parlance) any guild present and within the alliance will be rewarded with the kill and the rank and eligible for all the benefits associated with the kill (titles/loot/mounts/etc) while not having to necessarily worry about whether their time was wasted. This would be great because it would not only foster cooperation and partnership within the guild structure, but also among guilds. Too often when I join a big raiding guild, they become the only people that I talk to within the game -- by adding advanced guild alliance structures, there's a chance that there will be more intercommunication between people from different guilds beyond just the flaming and trash talking that takes place in other games with endgame pve (this goes just as well for pvp guilds as well).