Tiberian Sun Rising is not a mere remake of Tiberian Sun, but more of a reimagining and reconstruction of it, adding new units, features, abilities and gameplay style, while keeping the things that the fans love from Tiberian Sun, like subterranean units, stealth, Tiberium Lifeforms, original Tiberium and many other, making it a new evolution of Tiberian Sun.
The mod promises to include all additions from Firestorm with some changes, just like most things in the mod. One very nice feature the mod will include is changing map environment by uncontrolled Tiberium growth, which will affect the map's status from a normal area to a Tiberium ravaged wasteland with Ion Storms, Veinholes and many other elements.
Nod base in desert. Note the dark, Tiberian Sun like atmosphere. The mod will include its own maps too, featuring Tiberian Sun atmosphere.
GDI base in snow. Note the snow camo GDI will be using in snowy climates.
GDI desert base, featuring many GDI buildings and vehicles.