as we remember how they released ninjas, this would take more than a year to release all that, unless they got the project running long ago, and able to release it in their ""3 waves" which probalby will be around september-december lol. They may get the first wave with some easy/crappy stuff in the summer.
About them writing all that, they make an excitement for people, people have a goal, to wait, to test it, to bulk and such. Whats the point to release it the same day you announce it? people would like - what the hell is that, after few months pass lol.
Their aim is $$$, the more people, the more/new features, the excitement = more money. And since there already are people with full +12 set, including steeds, talismans.. this makes no competition, so they release new things, which people would bulk/buy/compete. They must keep this up to get more what i've said already.