Considering that the 35mm F1.2 Art is my all time favourite lens, there is no chance I'd pass up on it's successor. I know, the Viltrox F1.2 LAB is also a very impressive lens, but they haven't announced it for L mount yet and ultimately, I have some positive feelings towards Sigma (being reasonably priced and high quality while still continuing to manufacture in Japan) and I just wanna support them.
The 135 F1.4 also looks like a top class lens but since one of my main subjects, my wife, wasn't too happy with the rendering on the 105 F1.4 - she said it renders her body proportions unflatteringly - I ended up selling that lens and I don't think 30 mm more tele is gonna help to convince my wife.