I hope you read this, it is dated July 9th 2010.
Akio Toyoda would love to do a new Supra, probably won't happen — Autoblog
Let me quote some text from the blog entry:
Toyota CEO Akio Toyoda "wants to see the next Supra tested in the near future." But the reality of his company's current circumstances means it's unlikely to happen.
Toyoda said, "even if one president says that we want to have a Supra again, the whole company is not going to be responding to that request."
Between ensuring that upcoming models are trouble free, meeting new fuel and emissions requirement and delivering the FT-86 by 2013, a new Supra is likely to remain just a dream for the foreseeable future.
In short, it's not happening.