It's simple. Make it a movie where the dude needs saving.
Love story in the opening. Bad person wants something the heroin has, can do, or can get.
I say, has special ability to somehow get that others don't posses..
Has their people destroy their home and take him prisoner and will only give him back if she does x, y, z.
So begins her adventure where she discovers that giving them what they want would end in some sort of catastrophe - maybe the macguffin ends up being a child or just something that in the wrong hands could destroy the world or whatever...
I'm going to go with it being a child that has a special power - she can get it because of some sort of cosmic link. Also, lets establish in the beginning that she and her guy can't have a child of her own just to set up the ending both for her personal conflict in doing what she has to do once she discovers this thing she thought would be an object was a child and also for the ending-ending...
Anyway instead of turning this kid over to the evil one, she uses the macguffin's power and/or the help of the team she originally formed on the way to get said macguffin to go after the evil one and rescue her true love which puts him in more serous danger as a result but he totally gets it when he sees what she's protecting as she does all this... ends with new big found family and them having the child they were always meant to.
Fin
Love story - hero's a girl and her entire motivation starts out being about saving her man, then she feels like she has to make the impossible choice of choosing between her man and an innocent only to take a different path... maybe to make all the people that feel threatened about the dude needing rescuing, something can happen in the final battle where he steps in to save the child only to almost die himself and the child's powers save him (steal a little from Tangled, there) or some other similar thing - that way everyone's a hero, everyone gets a trophy and everyone's happy.
Disney, send me a PM and lets make this happen. I've already got a few ideas for the intial sidekick that totally won't be a donkey.