None of the members from DOAWorld appeared to talk to Team NINJA much at the event. DOAWorld's has the reputation as a casual DOA fan site so players wouldn't expect much of hardcore questions or suggestions being given by them, though I do know that at least one member of the site showed up but he's a member of all three DOA sites.
FreeStepDodge.com's team though did meet with Team NINJA, discussed the current state of the game, where they felt the game went wrong, and gave suggestions for future iterations. Contacts to Team NINJA were made there and questions to Shimbori and general feedback/suggestions are being submitted to Tecmo USA to be given to Shimbori. Shimbori also pulled some of the more hardcore players aside on his own free will to ask why they enjoy DOA3.1 more than DOA4. It should be noted that Shimbori is the director of Dead or Alive, but came onto the team after the third iteration so he wasn't around for the decisions and designs of the first 3 or Ultimate.
Are they really thinking about making another DOA? (sorry for the noob question and statement) But didn't they fire the guy who was in charge of the DOA series, so they made DOA Dimensions the last?
Tecmo owns the rights to DOA, their employee's creation is doing his job to create Tecmo's licenses. In other words, Itagaki can't make a DOA on his own and he doesn't get any royalties for such. Shimbori is the active director of DOA now.