will askran units have a banner?

"IS loooooves their money"
Indeed they do. Thats why it makes little sense for them to let us +10 units that are consistenly bonus units.

Maybe as some sort of special heroes or something. But not for merging purposes

I would like for the Musspell units to be free without merges. Hence their A Skills, which could boost their usability. However given the nature of said A Skill and it being inheritable, it makes sense that they'll be in a banner. However, I dobt' well get merges for the Askran Trio. Think of it this way.You are in the og universe, that is where you are.

Given that the only way to merge units per lore in FEH is to summon alternate dimension versions of that person and granting the power to the one you have now. Akin to absorbing the energy of one of your alternate realities before they go home. That means that whoever you keep is the de facto "original" person while the one you sacrifice is another dead end reality. That means that if we got iterations of Anna, Alfonse and Sharena, we'd have to kill off the Anna, Sharena and Alfonse of another player to do so (theoretically speaking) and as such wouldn't make sense story wise.

Along with that we have IS probably not wanting us to max merge a unit that's a constant pvp bonus unit (or at least on rotation) so giving us more merges would mean we would have to literally not pull ever for arena given that with F2P armors and dragons and a max merged Askran we could simply steamroll through arena no bigge. Build a Fae or Sheena against Rein and Lyn, build a A!tiki for tanking or any other sword like Soleil, build Gewndolyn or Nowi, and then you have your bonus unit. IE they dont want that being the case.

TLDR. Other than my other dimensional stuff making sense story wise, we also have IS undoubtedly wanting us to pull eventually. And handing us 3, 5 star +10 units on a golden platter doesn't fit their MO. Not even for Masked Lucina who isn't on rotation for that very reason.