What storyline would you like to see in the next few seasons for Barney and Robin?

I can't remember where I read this, but remember how Ted is the best man at someone's wedding? Well, the theory was that it could have been Barney's wedding, (marrying Robin, of course). That is where I'd like it to at least end up. I think that would be nice. I don't know about what happens in the meantime, though.
OH! I think it would be really cool if they became, like, best friends before they got back together again.

I'd actually like them to play laser tag together again. XD

I want Barney to realize he's still in love with her, and starts doing little things for her, while she remains oblivious, and totally over him.

i'll actually love them to have a love/hate relationship, like Barney loves Robin but she hates him (due to somethings he did). i want them to banter and sometimes fight but then when it comes to some stuffs, they'll still work together..that kind of relationship.
i actually wanted them to be like that since season 4 ending....because they can be their awesomeselves indivually and still have scenes at the same time. it'll actually last long.
it can play throughout the upcoming seasons and then have them endgame in maybe middle of the last season.