I'm not so sure. Everyone wants to say this team would be nothing without Hiruma, but what we're witnessing is a very dramatic depature from our norm to begin with. If this Dream Team removes players like Taki, Yuki, Toguno, Karoki, Komusubi, Juumonji, and possibly even Musashi in place of better players like Akaba, Taka, Banba, Mizumachi, Ootowara, Kakei, and Koutaro then we're no longer reading the same story.
We all know Sena and Monta are in this ultimate team; they've been confirmed and they're the focal points of the story. Now Hiruma is the control tower and his own personal feelings have been a slowly developing back story, so it's more than likely he'll play quarterback. However this Dream Team scenerio makes things a tad less interesting. Part of what made Hiruma so interesting is that he built a team from the bottom. I know that this All Star team will give Hiruma plenty of awesome play ideas, but a lot of the magic is going to disappear with this new story direction. It's not even the Deimon Devilbats anymore. The whole "demon" motif may just vanish completely. Hell Mamori may not even play manager. There's no dream now. The "Christmas Bowl" goal is gone and now it's just "beat USA". Without that goal the "original three" of Hiruma, Kurita, and Musashi are completely disposable. Of course Kurita proved to be the best Center against Gaou and Hercules so he's a shoe in, and most could argue that Mushashi's 60 yard kick could prove that he'd be an automatic choice for kicker (maybe have Kotarou play punter).
Hiruma… well it's been stated that he's only average when it comes to his physical abilities. His mind games were his strength, and he had a huge advantage with players like Yuki because people underestimated him. He's now going to be playing "full teams" (you'd think at this point they wouldn't need to run the same players on offense and defense) so he might not be able to get by on just trick plays. There might very well be times when the Japan team needs a better arm, and that's why we have back ups like Kid (most likely), Agon (possible), or Takami (uh... maybe? He's just Hiruma but... taller).