I, for one, am not too impressed with all the "co-operation" going around with Toyota, because it seems to result in compromising the performance that I look for in their vehicles (a 2 litre Boxer motor for the GT86? Even a VTEC motor would have been better, in my opinion, and I despise the VTEC Honda fans).
Nevertheless, Toyota has always been more concerned with "selling" cars rather than making amazing machinery (and yes, I am aware that the GT2000, JZA80 and LFA were statement cars) so it makes economic sense for them to share development costs during this time of financial turmoil (especially given that new buyers seem more interested in how "green" a car is than how well it performs for a given C02 production band). Of course, after watching the Koenigsegg video on camless engines, and their focus on high power without environmental compromise, in the coming years we might very well see a proper sports GT with 500-600hp and still being relatively green.