What seems most likely to me is that the African Bishops (or the Southern Cone bishops) will set up a parallel administration within the U.S. If ECUSA is tossed from the worldwide communion, that administration will claim to be the "real" ECUSA -- and the cat will be amongst the pigeons with respect to the property.
The "high" and more Catholic Anglican churches have been organized for a long time (since the ordination of women) under the Forward in Faith group -- that group is working with but distinct from the AAC and the Network. If the new organization in the U.S. turns out to be primarily evangelical, they will probably go with Rome.