The only problem is that you're thinking one genre, this day and age sorry to say Goktimus but sadly anime is what draws the kids. The kids don't know the japanese beast wars series so they want the same voice actors over and over and over again. Personally I dont like Supanova due to the fact that I find it unorganized especially last years sydney one. I know a lot of stall owners and they all said that Daniel was unorganized and that even Brisbane was unorganized for stall holders. Supanova only gets really what they want and who they think is popular at the time, ever noticed how many times Vic mignogna has came, one guy brought this up on the Supanova page and he was right the guy practicly lives in Australia lol.

Look at how many pop culture conventions are out there, you have Supanova, Armageddon and Oz Comic Con so I doubt another one is going to hurt considering that there is how many anime convnetions out there compared to the number of Pop Culture ones.

If you want a proper booth in which people will go to I would say Oz Comic Con or Armageddon as they are designed mainly around the Western pop culture where Supanova as some have pointed out focus mainly around the Eastern pop culture as that draws them more money in for them with the International MadMan cosplay comp.

Running a pop culture convention is a next step up from booth as you guys have already done it but the problem was you went mainly one culture and not around pop culture in general. A transformers convention in Australia wouldn't work out unless you have the numbers to make a profit and as you guys have said we sadly dont have those numbers and mass public won't attend unless you a big name actor going.