Ithink all godswords will settle at a good 3-5m because of the relative high alch value of them being somewhere close to 1m. plus, they are rare drops and the bosses are not completely soloable until your maxed.
Expect big crashes on both ags and sgs, but i think bgs will steadily stay around 3m.
off the topic, why did they decide to remove the specials? seems rather odd that they would ACTUALLY do it once the EoC hits live servers.