A black tanker truck resembling the Decepticon Scourge from Transformers: Robots in Disguise (2000) can be seen in the traffic jam created by the Autobot refugees.
When Scourge uses his fire breath, Crumplezone gasps "Flame on!" This is the catchphrase of superhero Johnny Storm (aka the Human Torch).
Scourge transforms to beast mode himself, with the promise of giving Leobreaker and Snarl a "Beast War". This refers to Beast Wars: Transformers (1996), which had Transformers take on animal modes.