There have been rumors about that, but sadly, if they havn't made a new episode in seven or eight years, I highly doubt they will make a 4th season of Sonic X :(
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sonic x season 4 will be out sometimes in 2011 i understand sonic x season 3 left off with a cliffhanger but season 4 everyone will try to find some way to bring cosmo back
# Does Cosmo return to sonic x in season 4 or 5
It is likely that there will not be a Sonic X season 4, but if there was, they would surely add omega, blaze, silver, and babylon Rogues to their roster.
No because season 4 doesn't exist.
Maybe. No one is sure yet.