Latest rumors :

Geneva 2019 - 488 huge facelift interior+exterior - 750 hp .

First half 2019 - new top of the range mid engine V8 TT hybrid, close to 1000 hp (!)

Sort of modern F40 , very sporty , new platform.

End of 2020 :  real 488 replacement, new platform V6 TT hybrid ~ 800 hp