Board Thread:Speculation, Theories, and Rumors./@comment-34129530-20140728020928/@comment-24145744-20140728105654

I think (and deeply hope) that he will appear. SEGA once said that they will have a lot of returning characters in Sonic Boom and that they would also kinda more listen to what the fans want (correct me if I'm wrong), so Shadow should basically already rehearse his lines.