PGR 4 looks to be shaping up good. I love that they added bikes, hopefully, their physics are right, and not like TDU (not that they were bad). I'm not sure about the dynamic weather though, hopefully they have an option to turn it off. I like that the weather can change, but sometimes I just wanna race on a sunny day.
A link to some info and hands on...
IGN: Project Gotham Racing 4 Preview