I can't see a Giulia based DS. A RWD Peugeot 608 yes, a RWD DS, no.I'm quite confident that we can imagine a mix of DS/Lancia.
Lower version on CMP and EMP2 platform, mainly made in France and finalized in Italy for Lancia and for the high-end, using the Giorgio platform and finalized in France for DS.
Now, how easily this can work, from an industrial/cultural point of view ?
But, my opinion (as someone from Europe) is that I'm not sure that there is a market for non-german premium brands.
The Guilia is an excellent car and sales are horrible, I can't really see what Stellantis can bring here.
I agree on the non German premium brands, that goes double for the US and Chinese markets. Alfa never had really successful sales on anything that wasn't FWD and 156 sized or smaller. That is compact in the US.