I know that now project on very early develoment. Coop now dont work, becouse need synhronyze first npc, players, lan and etc.
But we can do it in parallel. Without full sync.
If we run the storyline in the game, players will be busy. Some games have the opportunity, how would a single game, but at the same time, there is an interaction. In online mode, you can take one and same place in different ways, to transfer items to other players, making competition, make mods for the game, and more. This approach has attracted more people have to this the Online mode, the game. More people - more than willing to help, otherwise the development will last for ages.
Sorry about my bad english, hope u understood what i mean.