Trusts and suggested Characters

[Aylis]

The only one I want is Nero.

You do realize FFXIV's Trust system is nothing like FFXI's and so the NPCs forming your party are the actual npc, and are not a magical construct like the FFXI version? Hence why it's impossible for Shantotto and other crossover characters to be a part of it - Shantotto for instance returned to Vana'diel ages ago, so she's out completely. And correct me if I'm wrong but aren't Trusts here relevant to the story dungeon to be undertaken hence why the selection is limited?

I hate to say it, but you're not going to see much of an expansion into FFXI's version, that's just facing facts. Really you're more likely to see an expansion of the Company squadron into more content - the Trust system will probably remain SHB centric due to lore reasons.

Nothing is ever impossible when it comes to lore, since the lore is forever being written. In the case of Shantotto, yes as of now she returned to Vana'diel, but come later in say 5.4 or whatever, if SE wants to bring her back as part of the lore and story. Nothings really stopping them from doing so. Technically any NPC could be included if SE wants to write them into the developing story.