It still wasn't a main style Kirby game, and an exclusive amiibo wouldn't sell unless they intentionally didn't release one of the Smash series, unless it was like Knuckle Joe or something but even then that's not a big selling enough name to push bundles. So no, the stars would likely never align to make Rainbow Curse a "hit" by traditional means.
There aren't enough amiibo collectors to make a game a hit on amiibo alone. Even Chibi Robo will sell pretty poorly despite collectors diving in.
You should check out my YouTube channel, The Golden Bolt! I review all types of video games, both classic and modern, and I also give short flyover reviews of the free games each month on PlayStation Plus to tell you if they're worth downloading. After all, the games may be free, but your time is valuable!
