So Yoshi-P wore a Spider-Man shirt at the Fanfest in tokyo, and since the Scarlet Witch shirt pointed towards Red Mage, people already guessing.
The guesses are pretty crazy, the most insane being Samurai (Sam Raimi directed Spider-Man 1-3, Sounds like Samurai)
But the most likely is Blue Mage (Peter Parker was bitten by a spider and gained its powers, like how a Blue Mage takes hits from monsters and gains their powers)
The local Dota 2 Douchebag in my discord thinks Blue Mage won't happen because a while ago Yoshi-P said Blue Mage would be solo only, and proceeded to say it's Samurai (Again, insane and unlikely), Beastmaster, or...Puppeteer?
I still say Blue Mage is most likely.
Plus.
It was a Red and Blue shirt