One of Heihachi's 'super' attacks, "Rocket Away!", involves characters chained to a rocket which blasts off, whilst Heihachi observes via binoculars and laughs. This is a reference to Heihachi's Tekken 5 ending, where he does the same to Kazuya Mishima, Jinpachi Mishima, and Jin Kazama.
Heihachi's "Bowling Pin Toss" has Heihachi throw a Heihachi Trophy in an upwards arc that will deal damage to the first enemy it hits. This is a reference to Tekken Bowl, a Tekken side game that features Heihachi trophies as pins in the bowling game.
The move also has a chance of him spawning and serving a "Tekken Ball", which all players can then use to deal damage by striking it into enemies, just like in the Tekken Ball mode featured in Tekken 3.
The move "Kuma Tag Team!" will bring Heihachi's pet bear, Kuma, onto the screen.