I didn't really see a lot of similarities between Makoto and Spec MJ, vocal wise, if only because one was the voice of the dilligent, responsible, honor student while the other was the flirty party girl, but it's cool that you did
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Although putting it that way, I'd say Makoto's more like Lacey Chabert's Gwen.
Now I'm hoping for a Thor team-up episode, if only so that SpOck has an excuse to yell out "Loki"
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It's funny that you'd mention this since Robbie said on Tiwtter he'd auditioned for the game, just not for Spidey.
Of the characters we know are in the game, Harry is the only one I could see him possibly fitting as, although I guess if they cast Josh as Electro he very well could've been up for that role.
There is actually an amusing trend of Spider-Man VA's also voicing Electro at some point (Christopher Daniel Barnes, James Arnold Taylor, and now Josh Keaton).