Cain (Jeff Hordley) and Charity (Emma Atkins) had an acrimonious split at the beginning of the year, sparking an explosive feud between the pair.
More recently, Cain was attacked by a mystery assailant after alienating most of the village - with Charity and her new partner Jai (Chris Bisson) among the biggest suspects.
Discussing Cain and Charity's future, Blackburn told the Daily Star Sunday: "They will never get back together while I'm in charge. It's a lot more interesting with them apart.
"The Judgement Day episode was the culmination of Charity ending her relationship with Cain. It triggered a series of events that led to his downfall."
Emmerdale fans will discover who attacked Cain in early January.
> Emmerdale: Who attacked Cain? - Poll
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