Seeing the Dany talk here....

I think Dany is going to be a lot to deal with...and maybe the ultimate battle will be against her. I think she could potentially go "mad" like her father. They are laying a lot of groundwork with people pointing out she's heartless and so on...

I think what COULD happen is not that she would do something directly to Jon...but she could maybe do something heartless to someone Jon loves. Or just make a god awful decision about something that Jon can't get behind...and there will be conflict.