Perhaps I'm missing some sarcasm here, but . . . the Realms IS a pretty generic world. It's why Greyhawk, Mystara, and even Dragonlance don't see much action, because they are ALL fairly generic worlds without much to distinguish themselves from each other. And the Realms has long been the most popular of the three, so it makes perfect sense for WotC to highlight the setting.
The storylines of Tyranny of Dragons and Elemental Evil are PERFECT matches for FR. Retreading the War of the Lance in Dragonlance does not excite me, retreading the Temple of Elemental Evil in Greyhawk does not excite me. But adapting those themes to a different setting, one that is EASY-PEASY to translate to any homebrew? That is interesting to me, and I suspect to a lot of other people too, despite the Internet Kvetching Team's best complaints.
Guys, you are simply not going to get a new Greyhawk release anytime soon. It's also pretty unlikely we'll see a Dragonlance release in the near future. I'm a fan of both settings, and I'm excited to see their themes brought forward into the new edition. If I get a hankering to run me some classic Dragonlance, adapting Tyranny of Dragons should be super easy. Likewise with the upcoming Elemental Evil campaign if I really want to run me some Greyhawk goodness.
Or, I suppose, this is the internet. I could just join in on all the sour grapes and offended fans. Jeesh.
EDIT: Oh yeah, and the artwork is fantastic! Really don't get the complaints and weird "transgender" comments. Keep up the good work WotC! You are making at least this guy happy with 5E!