If Sid is taking part in JDJ i am sure he will last till at least till it is half way through if not because of his dancing skills at least because of the pubilic.
But I don't know who would have ever thought he could act and carry an entire episode on his shoulders on occasions that too when he had phenomenal actors acting opposite him?
He has come a long way where acting is concerned.
So dancing also he may come out as a much better dancer than when he entered the show if he takes part in JDJ.
Who knows if public see him improving they may give him a chance.