katou danzou, zz gundam, and zeong (fate and 4 more) drawn by shimouki_izui

Danbooru

Resized to 68% of original (view original)

Artist's commentary

-5-barreled machineguns
-Missile launchers
-Reskiniharden Sabers
-Wired Psycommu
-Hi-Mega Cannon
etc

HeeroWingZero

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That detached arm and the finger cannons are a definite Zeong reference, adding tags

Kurzwaltz

[hidden]

basedheero said:
That detached arm and the finger cannons are a definite Zeong reference, adding tags

Also, the forehead beam cannon and the mention of "Hi-Mega Cannon" in the artist's commentary point to Gundam ZZ.