The A-bomb package should cost 100,000 bomber perks. When successfully dropped on enemy HQ, the war is over and the next map moves into rotation. Also the perks will always be lost by default since the map rotation will occur faster than the enemy B29 can land back at its base.
So how many of you pesky bomber pilots have 100,000 bomber perks to waste???

OR
Whichever country has its HQ nuked, the country members will be required to switch to another country after their last sortie (without any time limit penalties until after the switch). No map rotation occurs yet, the war rages on- except its one country vs. the other.
OR
No.