What future EP will include zodiac signs?

I would say that a zodiac/birth sign system would have to build onto a solid personality & attraction system, something the game presently lacks, rather than just be slapped onto the existing game. So I would want something like that first, something along the lines of SoL's system, but more in depth maybe? And more autonomous behaviours are welcome, whether they are based on birth sign or personality system, as long as they are overridable. Sims 4 sims feel so samey.