It'd be really cool if Naruto ended up as an old pervert like Jiraiya.
The guy spent 2 years training with him he must of picked up some of his habits.
It'd also be the best way for Kishi to screw with the pairings fans.
Honestly I'm not, I really wanted to see an ending like that ever since the search of tsunade arc.
It would keep Jiraiyas spirit alive in a way and add to allot of comedy if there's a timeskip at the end.
Not really I know allot of guys that would be content with a life like jiraiyas(assuming he actually has sexual relations with allot of the women he meets in pubs and stuff, which I'm pretty sure he does)