right now these are the promocards on OCTGN that have a big chance being in that set:
Of those, the ones I'd really like to see would be any/all of:
- Sunfire Burst (unless in PvS)
- Asto Vidaty, Angel Slayer
- Bloodwave Greatbow
- Death's Head Scorpion
- Dragonclaw Wolverine
- Dwarf Krieghammer
- Fire Elemental
- Kumanjaran Leopard
- Lightning Beetle
- Magma Golem
- Mending Angel (unless in PvS)
- Mountain Ram
- Pharaoh's Cheetah
- Temple High Guard (unless in PvS)
- Unstable Fire Imp
- Victorian Griffin (unless in PvS)
- Altar of Peace (unless in PvS)
- Ballista (presumably toned down a little)
- Wall of Poison Gas **
- Bind Spirit (unless in PvS)
- Circle of Light (unless in PvS)
- Critical Strike (unless in PvS)
- Debilitate
- Life Link
- Mana Vampirism
- Reinforce
- Chitin Armor **
- Elfric's Life Ring (unless in PvS)
- Gloves of Skill **
- Heart of Gravikor
- Leviathan Scale Armor (unless in PvS)
Other notables:
- Mordok's Tome
- Screaming Zombie
- Ring of Healing (unless in PvS)
- Vorpal Blade (unless in PvS)
- Spiked Buckler (unless in PvS)
- Spiked Armor (unless in PvS)
- Summoning Circle (unless in PvS)
- Eeker (can't really imagine him in any other expansion; maybe something in Academy?)
- Hidden Tunnels **
- Messenger of Bim-Shallah ** (unless in PvS)
Wasn't Acid Blast just an early (overpowered) version of Acid Ball?
I imagine that Joseph Trublood, Eligor Larington and Gerard Matranga will appear in expansions that make sense thematically. And Eeker might fit in with those scallywags...
As for Blur and Ankh of Asyra, I'm guessing Blur will come with the male Forcemaster, and the Ankh might come with an Egyptian-themed expansion if one were ever made (perhaps with a female mummy-oriented Necromancer?).
** -> very high on my wish list.