DW3 will try and incorporate new ideas and content, and may well be a Fleet Carrier based expedition. It would be cool to see the DSSV Distant Worlds come along with us too and visit some of the spectacular sites out there.
I expect Frontier by then will probably be pretty stoked at the idea of DW3 showcasing the uses of Fleet Carriers being the forefront, but I definitely would not consider it unlikely to have the DSSV Distant Worlds make a detour from its route to rendezvous with the fleet, perhaps orbiting a waypoint world, during the week which we arrive.