It’s been revealed the special reprint in Duelist of Explosion is “Left Leg of the Forbidden One”, and that future Concept Packs (things like Duelist Packs and the like that are non-core Boosters) will have the other parts of Exodia, and it appears it is the Series 1 versions being reprinted.

Now if this ‘ties into future product’ means just the other limbs or we’re getting some sort of Exodia support at some point here, heck if I know.

Source