lol. There certainly is like nothing there though either. If anything, the entire plot was the characters realizing they don't work together. And ever since Book 2, there has been zero foundation for it. Like at all.
Mako and Asami are the only thing that makes sense. Because I. Asami has always loved Mako and wants him and II. Mako and Asami actually wanted to date, but Korra being in her amnesia kind of ruined that.
So they still have that plot kind of there. It hasn't been brought up or really like...existed since Book 3 and 4. But it still would make sense. Korra x Mako would be so fuckin ridiculous. Would make zero sense. And in terms of chemistry, they were pretty fuckin atrocious. Two hot headed people that set each other off. Korra basically verbally and physically abusing him. Was so cringe.
Korrasami makes more sense at this point. And even that would be stupid, since they've only ever had a friendship relationship. And I don't feel like they really implied other wise (yeah yeah, there was the shipper fuel, but it was really just that...shipper fuel). It wouldn't really feel organic to me, given how Asami felt for Mako. And also, the whole plot with Korra and Asami is weird. Asami has her boyfriend taken from her from Korra (her friend). Asami has nothing to do with Korra in all of Book 2. Asami hangs out with Korra and shoots the shit talking shit about Mako (suddenly they are best friends). Then they don't spend any time together in 3 years during Book 4.
But yeah, they are totally lovers.
There really is no ground work for any romance/relationship really (outside of Varrick and his squeeze, Bolin/Opal, Kai/Jinora). So if it's not them, I'll call bullshit. Asami/Mako would be kind of acceptable. But would still feel kind of forced.