The 3rd character from Spiderman dimensions has been revealed to be Spiderman from 2099. The last costume will be revealed at ComicCon, and I will be there live to let you know the details.
They have also announced that it will be available to play on the ComicCon floor. Ultimate Spiderman is the favorite choice, however I feel it’s too similar to the usual Spiderman costume and assume it will be something a little different. Possibly a What If? Spiderman, like What If Spiderman had become the Hulk, or his future daughter Spidergirl, etc. What do u think?