This is a two-parter:
1) Any chance for smaller Anet sponsored tournaments in the future? Even just exclusive minis that are no longer obtainable should suffice as rewards.
GW1 was made to be a competitive PvP game and still holds up fairly well (especially now that ping is amazing once again), I think it could be exciting.
2) Team Arenas were removed in the past and I agree that we probably do not need to fragment the community more by providing modes that are always available. But how about 4v4 tournaments using the Team Arena ruleset, let's say, once every 2 weeks? Would it even be possible to carry out?