No, they won't do this. They did this with Mercadian Masques and learned their lesson. And by learned their lesson, I mean they lost a shitload of money.Could the M14 letdown be the start of a set of slower, lower powered blocks starting with Theros?
From now on, every large expansion is going to have:
2-3 metagame altering Legacy cards. Think Abrupt Decay, Snapcaster, Lingering Souls, etc.
A bunch of overpowered 4-7 drops for Standard.
2-3 Modern crossovers. Geist of Saint Traft, Restoration Angel, etc.
5 or so Johnny artifact/enchantments like Possibility Storm, Door of Destinies, etc.
And at least 4 to 5 legends that people will want for Commander.
WOTC has gotten good at figuring out what will sell packs. We'll probably all be eating our hats when we realize we need playsets of those colorhoser creatures, 4 flying slivers, 4 doublestriking slivers, and 2-3 Chandras and Garruks for our Standard playsets.