Its because of the bloody haters (forgive my language, but I'm flaming angry about this). They went and destroyed this game piece by piece till there was nothing left and now SEGA is scared to use them. If you want my opinion as to what should be done with the haters is to show them the error of their ways.

yeah it makes no sence :(

It seems that way every charecter from 06 isnt getting anymore roles in sonic games i dont get it personally.

Its a pity shes not in more games come on sega.

I agree wholeheartedly to that. But, the reason Rouge has not played a major part in any more Sonic games is because she starred in '06 and thus must be purged, so SEGA think. For Pete's sake, they dont even listen to the fans anymore!