Any idea when Legendary Chewie event will return?

Coincidentally, there's no subsection for the HMF event which runs at the same time. How much gear etc do you need to invest in the BH ships to clear 7*?

I'll have all the ships there. HT maxed w zBossk all G12. Slave I maxed w Boba G12, Xanadu maxed w Cad G11+2. The only issue is IG2000 which will be 7* along with IG88 but I haven't invested in them at all. Literally. G1 Level 1.