I think we get these cards for character lvl up 50:
DM
Yami Yugi: Dark Magical Circle
Seto Kaiba: Blue-eyes Alternative White Dragon
Joey Wheeler: Red-eyes Black Flare Dragon
Mai Valentine: Amazoness Pet Liger
Téa Gardner: Athena
Muto Yugi: Pot of Duality / Swords of Revealing Light
Weevil Underwood: Flying Kamakiri #1
Rex Raptor: Souleating Oviraptor
Mako Tsunami: Drill Barnacle
Yami Marik: Nightmare Wheel
Yami Bakura: Dark Sanctuary
GX
Jaden Yuki: Elemental Hero Stratos
Zane Truesdale: Power Bond / Overload Fusion
Aster Phoenix: Destiny End Dragon
Chazz Princeton: Lightning Vortex
Alexis Rhodes: Cyber Angel Vrash
Jesse Anderson: Rainbow Dark Dragon
Vellian Crowler: Ancient Gear Fortress
Bastion Misawa: Mathematician
Syrus Truesdale: Super Vehicroid - Mobile Base
Sorry to disappoint you kid, but there will be no lvl50. and we are definitely never going to get any of those cards. Even from an an ultra big super special main box.
You chose way too many cards that are well beyond Duel Links' power level. We're not getting cards like Lightning Vortex, Soul-Eating Oviaptor or Swords of Revealing Light any time soon, especially as level rewards.
Of the first lot, I could see Pet Liger, Athena, Mobile Base and maybe Vrash/Rainbow Dark Dragon happening. (Though I'd sooner expect Rainbow Dark in a pack or a future Yubel event.)
I don't think we'll get Trust Guardian from Luna. It's a card belonging to Jack Atlas.
Same with Drill Barnacle. It's one of Ryoga/Shark's cards in Zexal, AND we already have it as a N in Valiant Souls.
We won't get Dark Sanctuary either, it requires "physical" copies of the Spirit Message cards, which requires 5 S/T zones to work. There's a reason why Destiny Board is a Skill instead in DL.
Dark Sanctuary itself would technically make Destiny Board's win condition possible in Duel Links (you can Summon the Spirit Messages as monsters), but there's zero chance we'll ever get Dark Sanctuary. The 50% chance to Magic Cylinder the opponent each time they attack is absurd in a 4000 LP, 3 monster-zone format.