It looks like Shadow is the Eclipse Cannon’s power source, not the Chaos Emeralds
One of the big plot points of Sonic Adventure 2 is that the Chaos Emeralds, gems of near-limitless energy, were used to power the Eclipse Cannon. From what we can see in the trailer, it looks like Shadow himself is the weapon’s energy source this time around. The Chaos Emeralds were used in the second movie, but haven’t been shown in the trailers for Sonic the Hedgehog 3 yet. So this might be one of the embellishments the movie is taking with the source material, although there is reason to believe the Chaos Emeralds will appear elsewhere in the movie. We’ll get to that in a minute.
