It may be a good idea but dont make a guy rejoin services better make him as the leader of mercenairies.
Then the ldr hide is true motivation to defend a village and surrounding areas.
Once mercenairies land in village place is almost empty with lil resistance from militia and the ldr begin to search his love and kinda not carring much bout the mercenairies wich create a sort of mutiny. Then he find the lifeless corpse of his beloved.
Now the mercenairies are trapped cause the enemy sent real forces to control the area and establish a base in the village. Leader now must get back is leadership by doing severals recon and spec ops objectives each that increase rank if achieved.
They get back together and have to get rid of the bad guys...
... if they succeed...it may end as the corpse the ldr saw wasnt the one of the woman he loved but her sister and his true love shows on completition...then Miller Time!!!
But this is about emotions that is not part of ofp world. maybe these emotions could be shown through very good cutscenes.
Can be a good challenge