The Wii U wasn't Nintendo's best move, as they're quietly hurting, but I don't think having the company produce more adult-themed games is going to help them. From the sound of it, Nintendo is making their money because of these 'kiddy' games, such as Mario and the Legend of Zelda, if that is what you're referring to. Games like those might be turning you away, but these games, in my opinion, seem to be keeping Nintendo and the Wii U afloat. Mario Kart 8 is also doing a good job of helping Nintendo.