Developer DC Designs will soon release the F-15 C, E and I Eagle for both Prepar3D and FSX. In the mean time, the developer has shared a range of previews including a new trailer showcasing the fighter jet off in style.
The aircraft will feature 3D virtual cockpits with accurately modelled details and texturing, along with working 3D instruments and a working rear-view mirror (in Prepar3D only). Alongside that, the aircraft features custom-coded radar for live intercepts, a moving map and also a heads-up display with an authentic layout.
The new previews seem to indicate that the release is close. You can find out more on the product page.