Don't know if they'll be grabbing stuff from 7 or 8 as it's specifically a XIV event, and XIV is actually missing most of the ones you'd use outside of concepts (the Garlean empire use gunblades, though they're more like sabres than what you'd expect) and limit breaks (the generic melee one uses the Buster Sword to use Braver).
My bets would be the XIV artifact or relic gear for classes that have analogues in MH. Like S&S getting Curtana and the Holy Shield, Insect Glaive getting the Gae Bolg, etc. Dunno what they'll do for lances, might just make them Behemoth originals.
If the hammer isn't a goldsmith's hammer I riot.
Nero's badass
mech hammer, and I'll pout a bit, but still be content.