SHADOWBRINGERS

[Theodric]

Retroactively rename Stormblood to Crimson Liberators and Shadowbringers would be an alright expac name.

There's no need. People can just get into the habit of referring to Stormblood as SB and Shadowbringers as SH.

That is, of course, assuming that Shadowbringers is the title of the expansion...though I think it's likely given what we know the expansion's likely themes.