User blog comment:123VideoGamerNinja/Super Smash Bros. for Nintendo 3DS/Wii U Episode 3: Newcomers/@comment-25232183-20140728163300

Even though K. Rool was a good idea, I think the only one that might really happen is Bowser Junior. He's actually been getting more recognition (Especially as a villain) ever since Super Mario Sunshine, but they don't always base it on popularity, so you never can tell.