I would be painfully confused since the lack of manpower, budget, and time would favor the simple reusing of assets (porting Meta Knight and King Dedede) as opposed to an entirely new character, one that operates like the Ice Climbers (and even MORE complex, considering Ice Climbers had the exact same proportions but Tiff and Tuff do not), one which proves an impossibility without good processing power (i.e. 3DS)
Not to mention Meta Knight and Dedede being Kirby characters that appeared in Sakurai's Kirby games, it would be like removing Uprising Pit, Palutena, AND Dark Pit in place of Pixel Pit from his first game and a fan made Kid Icarus character. It just wouldn't make any sense.
oh god...
people joke about Beige Pit and Off White Pit being DLC characters but a legitimate (but bad) idea:
Pixel Pit for DLC! The Toon Link of Pit.
*shot*