RT said:
Wait, only NOW they do this? I thought they'd make them back in the nineties, during the series' heyday.
It was previously revealed that as well as several LEGO Simpsons sets, a LEGO Simpsons TV show is also in production for this year.
Wait, what?!
That's because in the 90's, nobody had clued them in that show tie-in sets would be popular.
As far as I can remember, they didn't start doing major tie-in sets until 1999, with Star Wars Lego sets.
Now the Wikipedia page says that the Star Wars sets were the 23rd intellectual property tie-in, but I can't seem to find out where that point came from, cause searching for the others finds nothing before Star Wars, and the source cited for that point, the source doesn't even say that point.
I'm willing to bet that Star Wars was the first movie/show tie-in.