It would be really cool to see Milo Yiannopoulos on here. Since his twitter ban he might be looking for other outlets. An uncensorable one would be a great place to start I think.
Looking forward to the debate with Tone Vays. It would also be interesting to hear an interview with the developer(s) of steem. Having read the whitepaper myself I'm still not totally convinced that the platform can have long-term viability, but I don't think there is any scam involved.