I got three 5*s in one pool a long ways back. Pre-mass demotion. I know Lucina and Athena were part of it, and I think the third was Cain? I want to say it was a sword unit.
With Tiki, the common idea now is that each FE universe, including the Heroes universe (and possibly will be the exception in the end), is getting two Legendary units. It would explain the lack of Valentia and FE6 Legendaries, since the other games within their worlds are getting the units. Jugdral's just screwed.
With that in mind, we have:
Archanea: Marth, Tiki
Elibe: Hector, Lyn
Magvel: Ephraim, ???
Tellius, specifically Radiant Dawn: Ike, ???
Awakening: Lucina, Robin (evil or not)
Fates: Ryoma, ???
Heroes: Fjorm, Gunnthra
14 units with this potential final structure, with the final two to fill out the chart going to Hrid and Ylgr, as per the potential exception. We are currently awaiting the last Red Legendary, the last Green, and three Colorless.
Going by this, it seems a foregone conclusion that Eirika and Micaiah will indeed be getting Legendary alts, with Eirika being the remaining Red unit coming next month, bringing in a "Flame" Sieglinde and Lunar Brace. Micaiah could be Green, to run a Thani for each color, but the more consistent idea would be her being Colorless and using a Staff, perhaps with the same Thani properties regardless. From there, it's a tossup. If the other two Nifl royals are coming in, one of them will have to be Colorless, with the other being Colorless too or Green. And who knows who will be that remaining Fates unit and what he or she will bring.