plot idea:
protagonist(P) is retired superspy from a war(contemporary) like ten years ago. has riches, fame and pleasure, but no close connections. misses the war. is visited by self(AP) from alternate timeline, where the war is still going on with sci-fi technology. AP is proper tired of war, but is too important to disappear, so they travelled to a different dimension to find a replacement. they have to learn the other's life by shadowing each other in disguise. P's universe is fish out of water comedy, AP's universe is action sci-fi comedy.