It's hard to predict which models will be chosen, in general one tends to think of models with simple lines, but lately they have surprised with lines quite difficult to replicate, so who knows.
I love one of the comments: > The fact my Lego, from when I was a kid, still fit and work with my kids new Lego sets, is a testament to the engineering.
I'm a bit late to this but I agree with what @tommy says, although it's also worth saying that the recent launch of the Eiffel Tower really does justice to what the Icons line should be, something new, clever and simply stunning (the tallest set in history).
Yeah, what you say is pretty possible, it could also be licensing issues but seeing that they have already collaborated with The Simpsons, I don't see that as such a compelling reason...