Yeah, I'm not gonna hold my breath. That bodywork doesn't look like it'd adapt to the 5-door as easily as the ST's did, and Ford isn't likely to homologate the 3-door for US sales just for one model. That aside, if it's a real RS it'll involve comfort and practicality compromises that would make it a less desirable car anyway. Part of why I like the FiST so much is that it's a normal practical car with added performance, if it were going to be a dedicated two-seater I'd get a real sports car instead.
Suprised they just dont call it a R3. After all that is the FIA class that our ST would race in anyways. (1.6L turbo 2wd 250hp limit)
Also suprised M-Sport builds an R2 then skips all the way up to R5.
The ST is essentially a non-caged street version of a R3 class street car. It would be an easy selling point to rack up some national, european and world championships with one. If I were Ford, I'd sink money into those championships since they dont offer an awd street version anyway.
As a side note, Rally America needs to get w/ the program and class cars correctly according to FIA rules.
I don't see a Fiesta RS in the future, but a good chance for a Focus RS. It would be a tough sell to have a Fiesta RS priced well above the Focus ST. The larger size and price point of the Focus make it a better candidate for the RS. However, the RS model has always been the WRC car and the Focus doesn't rally anymore. I also doubt it will have a mechanical LSD since Ford has been working on using electronics and geometry to get away from a mechanical LSD.
What is known, from a number of sources, is that it will be FWD, gas powered, and have a manual transmission. AWD is heavy, complex, expensive, and hard to package. There was rumors of a turbo FWD/electric RWD Focus RS, but that isn't accurate.
As for a rally Fiesta ST, there is already one going together and plans for a lot more of them for the Rally America series.