That's actually a very good question.

I must admit that the two 'main guys' as they were, on the right and left don't really match, in fact they don't really appear to be drawn in the same style, which makes me think they are from two different series. If you're trying to make it appear as if they are the contestants in that ring, with them shaking hands in the background, you might want to rethink it.

Another thing of note: try to avoid focusing all your visual attention on the center. Symmetry is boring, and having a balance between off-center and center, and symmetry one way or another will draw people's eye around and make them look at it longer, thus making it more interesting. The way that the two faces frame the center ring, with the small animation focusing you right into the center means that the composition only drags eyes into the middle and is rather uninteresting.