As Tokina recently has announced their first FE lens Tokina FiRIN 20mm f/2 FE MF Lens at Photokina 2016, Sigma is also planning to release some FE lenses. According to a recently interview with Sigma’s CEO by Focus Numerique, Sigma will release several FE lenses in the near future.
From Focus Numerique:
The future of FE mount is beaming. So yes we will come out of EF mount objectives in the future.