Good Mythical Morning intro painting with clay Belvedere (WIP)

I am currently working on sketching out the Good Mythical Morning intro without Belvedere, because he will be a clay figure, then I will paint the sketch. I accidentally made the canvas off center, which is not shown in the picture but is pretty obvious in real life, so I thought I should take some advice from fellow artistic Mythical Beasts. Should I cut the canvas to be centered, or should I just end the painting where the picture would end at that spot? Which one do you think? Comment below, and I will count them all up when the canvas is completely done and so is Belvedere.

Be your artistically mythical best,
Faith (Sheepzon)