The cutscene of the Mammoth MK 2 destroying the Nod base has references to the Hoth assault, such as the four-legged walker, the uselessness of the defenses against it, the Mammoth crushing the car similar to Luke's snow speeder, and the Mammoth destroying Banshees, which look similar to snow speeders.
A ruined old fashion NOD base can be seen on a mission. The vein-hole monsters and Tiberian fiends from a C&C95 cut scene appear on the battlefield in TS.