Harrison's manager Alex Morrison has confirmed that reigning British lightweight champion Derry Matthews has agreed to make the Scot his voluntary defence if he defeats European champion Gavin Rees, on July 7, in a double belt battle for both British and European titles.
Harrison will also have to dispose of 31-year-old Bariz in what will be his first fight in six-and-a- half years if he is to challenge for the Lons-dale belt 11 years after his last British title fight.
Morrison said: "We have reached an informal agreement with Derry Mathews' camp that if he beats Rees he will happily make a voluntary defence of the British title against Scott.
"I promised Scott that we would not hang about once we got him back in the ring and now he has a massive incentive to get passed Bariz."
Meantime, St Andrew's club supremo Tommy Gilmour says he is relishing tonight's season ending show at Scotland's most famous boxing institution.
Gilmour has enjoyed another successful season uncovering outstanding Highland heavyweight prospect Gary Cornish.
While just nine days back another Gilmour fighter, Paisley puncher Kris Carslaw covered himself in glory when only an horrific head gash stopped him from becoming the first Scot to land the British light-middleweight title.
With tonight's card at the Radisson Blu topped by another one of the St Andrew's supremo's exciting stable, unbeaten Paisley prospect Steven Weir, Gilmour was in ebullient mood.
He said: "It has been another great season at the St Andrew's club and it is amazing to think next year will mark our 40th anniversary. On top of another fine card of professional boxing we will also be making a special presentation to John McDermott, one of the most respected trainer's in Scottish boxing history.
"We will also be unveiling our Wilson Digital Boxer of the year so we have a packed show for our patrons tonight."
But there is no doubt that Gilmour has great expectations for heavyweight Cornish.
He said: "I have always wanted to uncover a Scottish heavyweight who could claim the British title and now I believe I have that in Gary. He has shown a tremendous ability to learn from each fight and has already racked up eight wins without loss.
"But the key is not to rush Gary. He will enter British title contention when he is ready and not before."
Reflecting on the dropping of the final curtain on another season at the top of the tartan fight game Gilmour was in philosophical mood.
The promoter said: "It is amazing to think that I am now 43 years as a licence holder. But the Gilmour boxing dynasty will not end with me.
"Obviously my son Kris is building his own empire and now we have in, young Max Gilmour, my grandson, a young man with the perfect name to make sure we have another generation of Gilmours in boxing."