I want this pack more than anything since it's the most needed content right now. Sadly, it seems unlikely since the team only seems to care about young adults and their gameplay. On ex-guru even said that if they ever do decide to touch family gameplay, they want to separate it into 20 different packs instead of just doing one well made pack that finally gives content to the ages who have nothing.
Their "informational post" said that these upcoming packs are meant to be "surprising" and "never done before", so Generations is surely not the theme for any of them. It's sad, because in 6 years there's still nothing for family players to do aside from take their sims to the park :/