Talk about a comeback. As a kid, I enjoyed watching the original TMNT, though the series itself, looking at it today from a non-nostalgic perspective, feels a bit dated. Must be the lingo Michelangelo used. I can't recall the last time I heard "cowabunga" used in everyday conversation.
But the basic concept is solid enough that producers thought it might still be a hit today, they just need to update the visuals and feel for today's generation. Boy were they right. Not only did the rebooted TMNT become a hit among kids (my nephews are all over that stuff), it's such a hit that Lego gave it their own stamp of approval and acquired the license to create sets based off of it.