Here's my take: I'm betting the base version will do 0-60 in about 6-6.5 seconds (I mean, come on, the celica GTS did 6.8), then the turbo will be somewhere in the 5.4-5.8 range, then the track will be somewhere in between but still closer to the base version as they have already stated that it will be NA and lightweight.
To be honest, I would like to see a NA larger engine with more HP for the performance version, but I doubt this would happen as a larger engine can upset the chasis performance dynamics they have based around a lighter engine. There are rumors that this will be the celica replacement and that there will be a completely different supra replacement. But to be honest, I like this and only want a higher HP performance version. The original red concept had all the flare needed to be a star, just add HP......