Hate to be a spoil sport, but this is all that we know for sure at the moment (all which has been officially released by Alfa Romeo as of June 2018):
All of the renderings of a Giulia Coupe, GTV, and Montreal (and now 8C as well) that are floating out there on the internet are strictly speculation.
However, we do have an indication from FCA that all new Alfas will emerge on the Georgio platform (same underpinnings as Giulia and Stelvio). These are due for a mid model refresh before 2022. There will also be an LWB (long wheelbase) version of Giulia, as well as a larger SUV on the extended version of that. And I believe there were 6 new engines in development starting roughly 18 months ago (the first 3 of which have made their appearance in Giulia / Stelvio).
Giulietta (not yet available in North America) will also get a mid model refresh and FCA has already trademarked that name here, so it will launch soon.
But I do think that the car will be beautiful - based on most of the marque's history and recent output. And likely affordable (at least until you get into the quadrifoglio model).