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Jumping the gun: I think I figured out Jan's mythic hero banner
They promised us Ike and Eirika in red, Tiki in blue, and Lyn in green. That's already four. There's no colourless. The new mythic is going to be colourless.
Red I'm expecting HF Micaiah for a third.
Blue I'm expecting HF Ryoma and Quan because Tiki hits res. Some possibility of swapping Quan for Ophelia because there are a lot of blue casters to get through (Ophelia, Kliff, M.Corrin) and not so many def-hitters (Quan, H.Niles who's maybe a bit early in February, Ylgr) given that the numbers tend to balance in favour units that hit def.
Green, they probably finish off CYL2 with B.Ephraim, and I'm expecting a mage to round out the green focus cast with diversity. I think they get Lewyn in before Gunnthra returns, and if not then we're probably looking at an early F.Corrin with Lewyn reappearing with Hector or even later.
Colourless, S.Linde and some healer are probably sharing with the new mythic. It's between Mikoto and Loki.

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