We can see same primal again but in different shape (it was mention by Koji) because of culture and belief from people who summon them.
So, what I think, it's we will see Bismarck again, and summoned by Namazu beast tribe this time. It will not be Bismarck from sky, but from ocean.
For Lupin, I expect to see an other Fenrir.
For Qiqirn, maybe something strange and/or dark as Anima or Doom Train.

Yojimbo will be probably a boss from Omega Savage at some point if we got 4 turns from FFX.