Easy, have the two either join the same DC or replace them with new people seeking that didn't want to move for their old group.

Waiting until 5.0 release would just create total chaos, and no doubt issues they didn't know about, emergency maintenance and more.


And for Plots of land, there is bound to be plots vacated on all worlds due to this split, you may even get a better plot this way. Not only that, but it wont even matter what world on the DC you choose, you can buy a plot on your home world and go play on your friends/groups, they even said they may revoke some limitations depending on how well this plays out.