So fast forward to the 787
I am not qualified on the 787.
Are the right side doors going to be armed?
Most probably not.However 2 high flow exits must be available.(depends on type and airlines).
In that case ,one high flow would be the stairs by which you arrived and the othe r ,the LEFT AFT entry.
Cabin crew must be briefed as per which entries/exits to be guarded/armed/kept clear in case they are needed.