There is a rumour floating around on a German TT forum regarding the engine issues with the TT RS and the upcoming RS 3 saloon.
First of all this is a rumour and I am not sure I believe it entirely, but there are some interesting coincidences and circumstantial evidence. Do not shoot the messenger!
All Audi 5 cylinder products are to be removed from sale as new product from the end of the year. This includes the TTRS which we know about already and the RS Q3 (http://www.uk.audi.c...s/q3/rs-q3.html) which is no longer available to order, only pre-built units available from stock as per the TT RS.
The rumour goes on to state that a 'fixed' 5pot would be back in production and to order by BW24 (June 2017) which happens to fit with the RS 3 Saloon timescales published so far by Audi (coming late 2017). No word if the TTRS will ever be available to order at that point. Rumour also suggests that given the current problems already faced by the new 400PS 5-pot that it will be the last one ever produced as the struggle to continue meeting strict EU directives is too much these days.
I hope it is all rubbish, but you have to admit there are some coincidences within the rumour. Let's hope it is not true.