Okay, I can see it's being a possibility for being canon if Hiro decides to portray their relationship more. Like give us a filler for these two or something. But I don't like it. I ship Cana with Gray, Lucy and Bacchus. Maybe Hibiki but other than that, no one. As for Laxus, I ship him with Freed (but I love MiraFreed) tbh Laxus shouldn't be with anyone. There's just some characters that can be shipped with anyone (Gray, Lucy etc) and some who can't be shipped with anyone! Leave it be, but Headcanon is: Laxus will end up alone.