Why these contradictions ?
You removed Joe Fixit from the basic arena cause he didn't fit the story
But Hyperion has no link to Spider Man and else, and he is sitting as a boss (with some nice nodes), why ? Cause he can get his sp3 and deal damages to the players ?
Will it be the only thing you find for increasing the difficulty ? Make the opponements get their sp3 always ? Like Kang in the previous quests ?