Board Thread:Questions and Answers/@comment-5241844-20131003144116/@comment-23764456-20140123144621

Dolphinluvr16 wrote: I hope they inculde them. There's plenty of potential for it, and I would certainly hope they at least hinted a little bit at some shipping between the two if they were introduced, considering next to couples like Shadouge, they're a pretty popular couple. not SEGA's plans for them I believe.

people in the fanbase overlooked an important aespect of the relationship between Silver and Blaze, and that is, that they have a brother-sister relationship in Sonic '06, not a potentially romantic one, what the fanbase wants often miss the context of what writers planned or officially follow for the characters.

in a free translation (forgive my mistakes) of Blaze the Cat's original Japanese character profile for Sonic the Hedgehog (2006):

''"Having duty of protecting and manipulating the Sol Emeralds (which form a pair with the Chaos Emeralds). Usually Blaze is calm and collected, but in fact she holds burning emotions strongly hidden. Although Blaze is shy around strangers and puts a lot of pressure oh herself, she works well with Silver as a partner who for her is like a younger brother." ''

this is the only piece of official (as in written by SEGA/Sonic Team) information that details Blaze's relationship with Silver in the alternate timeline, that's all we have.

and sorry for being wordy, I just wanted to be as accurate as possible while citing only official sources.