Seems like Oda is slowly returning to original root like earlier pre-timeskip, Luffy being absolute carefree and goofy. This and previous chapter feels like something only happens in the anime opening like 8 and the massive turtle one.
The Sun God has resemblance of Sogeking and the skypiea cover page. Sogeking wore Sun shape mask and the giant slingshot similar to the one wield by Sun God. Skypiea cover page has Usopp as statue, the skull is alternative to Sun God's Helmet, and the shield has a label 'God' on it.
That fake Sun God could be a man base on the eye design. He wore the moose skull which can resemble devil Baphomet, Baphomet can be a man and woman. Base on the high heels, he can also be a woman. All these led to another connection of Imu.