A tie-in too far?

I understand the need for film and TV commercial tie-ins, I really do. I get that it's a sales thing, and it works very well. I'm even going to resist the temptation to take the moral high ground and say it's appalling, simply because if Lego had the Star Wars tie-in back when I was a kid and up to my eyes in space Lego, well, I probably would have melted...

These days, Lego has superhero tie-ins too, and is no discriminator - Marvel and DC characters get equal shelf-space, and sell equally well from what I can see. The comedic Batman in the recent Lego Movie has probably helped shift a few units too.

At what point should there be a cut-off though? Because Lego now have superheroes in their Duplo range, i.e. aimed at pre-school kids. Now in my book (and depending on how old you are), the Joker should look like one of these guys:

Credit to the excellent First Rule Of Film Club blog for making this composite image, thereby saving me the trouble

Except if you are three, and playing with Duplo, the Joker looks like this little chap:

Don't get me wrong, I've got nothing against Lego - quite the opposite, in fact, I could still happily spend all day building things with it, despite being in my mid-forties. And I'm a realist, not a prude, when it comes to the modern reality of how companies seek to maximise sales through commercial tie-ins. But shouldn't there be a limit, especially where toddlers are concerned?

If not, how long before the Lego Technic chainsaw from American Psycho hits the shelves?