Like I replied to another post of yours, this has been considered by the Grand Alliance (currently DOA, Clan Omnis and DCP) but I'm not sure on how far the plan has come along.
Unfortunately if your plan was used, you would have to go round the world at least twice for everyone to get every spawn;
*Start*
Say it starts in Fyros. The people who start in Fyros have to go round the world and back to Fyros to get all the spawns.
It then moves to Matis and the people who joined in Fyros get the matis spawns. The people who joined in matis might not have the fyros spawns, so will have to go all the way round back to matis to get all the spawns (one more region than the people who started in Fyros)
It then moves to Zorai. The people who started in Fyros have 3 sets of spawns, the people who started in Matis have 2 and the people who join in Zorai have 1.
It then moves to Tryker. Yay, the people who started in Fyros now have all the spawns. The people who started in Matis still need to go to Fyros, the people who started in Zoari need to go to Fyros and Matis, and the people who join in Tryker need to go everywhere.
It goes back to Fyros the first time, Fyros people leave, Matis people just need to get back to Matis, Zorai people need to go to Matis and then back to Zoari, and the Trykers have their second set of spawns, but need the Matis and Zorai ones, and then need to get back to Tryker.
*1st Trip Done* but the Trykers need to do a whole trip again, and they will be on their own for the trip from Zorai to Tryker unless some people are willing to do two round trips.
So I guess what I'm saying is, doing it in one go is nigh-on impossible.
I do however think that it is a good idea, provided you don't try to do it all in one day.