I'd get rid of the soughta overlayed cloud effect, you should know what i mean, its really noticable up the top & bottome left... Anyway the clouds really destroy the rushing explosion hapening in the middle... or you could keep it & run a radial blur on zoom at 100% through it twice, that'll look sweet

The text brushing I'd get rid of around the the title & I'd keep one of the horizontal or vertical ones & run it to the edge & that'd look better than them meeting in the corner...

Good job on the render though