List of cards used by Joey Wheeler/Katsuya Jonouchi in the manga that may be included/retrained in the new Dark Time Wizard theme in the future.
TCG card names:
"Giltia the D. Knight"
"Swordsman of Landstar"
"Trap Hole of Spikes"
"Roulette Spider"
"Little-Winguard"
"Gearfried the Iron Knight"
"Polymerization"
"Rocket Warrior"
"Magical Arm Shield"
"Kunai with Chain"
"Lightning Blade"
"Giant Trunade"
"Shield and Sword"
"Question"
"Gilford the Lightning"
Special mentions as possibilities, in my opinion, are a main deck version for Red-Eyes Black Dragon having some effect that treat it as having the name of the OG monster (which could eventually represent Jonouchi reinserting the card into his deck after reclaiming it), Thousand Dragon (this is still a Time Wizard-based deck after all, it can be an exception even if not played in the Battle City manga saga), and an upgrade of Panther Warrior with the Flame Swordsman sword (due to Tenki's new artwork).
Edit: I forgot to add that, at the moment, Gilford the Lightning and Rocket Warrior seem to be the cards most likely to appear first for Dark Time Wizard's future support between these ones, because:
-Red-Eyes Black Dragon Exceed's resurrection effect can Special Summon any monster level 8 or lower, but we currently only have monsters up to level 7 for the archetype, with the new Jinzo being the highest level monster. Gilford is the only level 8 monster Joey used in Battle City in the manga, and this could be a similar case to when Gandora Geas listed level 7 or lower monsters to summon with its effect and we ended up getting a dedicated Dark Magician in the Infinite Forbidden follow up.
-Rocket Warrior appears in the Reversal Box artwork alongside Alligator Sword (which is featured in this wave in its fused form with a Baby Dragon), which seems to imply its arrival soon.
Edit 2: Apparently, I haven't notice "Shield and Sword" from the cards used by Joey, which he activated during the four-man duel in the Duel Tower in the manga. I'll add it to the list even though the image isn't there. Thanks to u/CSS655 for pointing it out.