remnant navy campaign

I planning on working on a campaign based on a remnant fleet of naval ships that have been attacking the abberationists and the purists . This fleet would be remnant naval vessels such as carriers, destroyers and cruisers that were in a battle group and deployed at the time when humanity feel. This group would have started new in Antarctica were there could be some kind of secret naval base that sustained the ships and there descendants. Much like the purists only there culture is on the sea. Most of the crews could be in suspended animation and only come out for operations every fifty to one hundred years. Its something that im toying with , ill keep you all posted.