The show favourites - played by Jessie Wallace and Shane Richie - are expected to make their screen comeback at around the time of the Queen Vic fire.
According to The Mirror, the deliberate blaze - which is also thought to tie in with Barbara Windsor's departure from the soap as Peggy Mitchell - leaves the pub as nothing more than a mere shell and Alfie's first order of business is to rebuild the place from the ground up.
Kat, meanwhile, allegedly reprises her role behind the bar as landlady.
A show source said: "Alfie has big plans for the pub. He managed it for The Duchess for a while when he first arrived in Walford - so he'll soon be back where he belongs with Kat by his side."
They added: "Even though the fire completely guts the place, the bronze bust is one of the only items to survive - it'll still be in pride of place when The Vic reopens."
Show bosses are remaining tight-lipped about their return but a spokesperson said: "We're looking forward to the return of Kat and Alfie later this year."
Kat and Alfie were last seen in Walford on Christmas Day 2005 when they drove off into the sunset together in their Ford Capri bound for America.
Wallace is currently filming in Manchester for BBC Four's docu-drama based on Coronation Street's 'origins'.
> Location Pics: BBC Four's Corrie drama