What if Naoko is actually getting her hands warmed up by expanding the Sailor Moon series via manga. Though that has little to do.with Crystal, it'd be interesting if she did in fact, added a new arc to Sailor Moon which would air in 2020. Hahaha!!
I personally think Crystal will be alright and given the fact Dream and Stars were never adapted properly and divert so muxh from the manga, that Toei has to take care that it's done "correctly'. The stars saga is already spotty manga wise so hopefully, they will use the time to patch things up possibly.
Besides, Stars has a fairly big cast and entire new art scheme with all the senshi going Eternal and the introduction of new senshi and everything else...to me, Stars sounds like a cash cow for Bandai or whomever does the toys and stuff, I for one would love the Eternal Inner figuarts and other senshi from different galaxies.
There's still lots of money to be made here!! Toei ain't that crazy...