Board Thread:Speculation, Theories, and Rumors./@comment-24024381-20140107001957/@comment-679780-20140108191959

Another possibility we haven't really considered is, like Scourge, Blaze could of been an alternate counterpart. Future Blaze coming from Sonic's future with Silver and Sol blaze from another dimension entirely.

Though to make things slightly more easier to understand, I prefer the idea Future Blaze died and she was reincarnated in the Sol dimension.