Sigma is expected to launch new products during the 2025 CP+ show in Japan. There is a Sigma event scheduled for March 1st that includes "talk about the appeal of SIGMA's new products" (Goole translation):
Sigma already confirmed that they are working on a new and unique telephoto lens “that has never existed before”:
Sigma is working on a new and unique telephoto lens “that has never existed before”
The second lens could be a cinema autofocus version of the 28-45mm f/1.8 DG DN Art:
Sigma is developing a cinema autofocus version of the 28-45mm f/1.8 DG DN Art lens
Via dclife