The six-year-old is a full-brother to Douvan, who won the Supreme Novices' Hurdle and Arkle for Willie Mullins before injury interrupted his career.
Nicky Henderson has been lucky enough to train some of the best two-mile chasers of recent years in Sprinter Sacre, Altior and Shishkin and should everything go according to plan, Jonbon is likely to shorten even further to emulate his illustrious brother in the Arkle at the Cheltenham Festival.
He has only been beaten once in seven races under rules, by his exceptional stablemate Constitution Hill in last year's Supreme, and Henderson has likened it to the year Altior beat Buveur D'Air in that Festival contest.
Despite an initial foray over fences, it was decided to keep Buveur D'Air hurdling with Altior going over fences and it paid off, with Buveur D'Air winning the first of his Champion Hurdles and Altior landing the Arkle.
Jonbon was virtually foot-perfect on his chasing bow at Warwick – a notoriously tricky track for a novice – in disposing of Paul Nicholls' classy Monmiral.
"I wouldn't say I was exuding confidence because Sandown is quite a big test for any novice. In fairness, Warwick wouldn't be the easiest, but he jumped very well that day for his first run," said Henderson.
"Sandown is a unique test, you turn down that back straight and jumping is at a premium and once things start to go wrong down there, they can go very wrong. We've seen some very good horses get in a muddle.
"I know he sweats a lot before races and will be on his toes, but when he's racing he's got a very sound racing mind.
"I don't know if anything will give him a lead but if there isn't it doesn't matter as he's very versatile like that."
Henderson went on: "He's always looked as if he would make a chaser, so would Constitution Hill but he's staying over hurdles, it's like when we left Buveur D'Air over hurdles and switched Altior to fences.
"Jonbon will undoubtedly get more than two miles, but he's got bags of pace at the same time."
Jonbon cost JP McManus £570,000 due to his famous sibling, although his trainer feels he has achieved enough now for that not to be mentioned anymore.
"I think he ought to be allowed to throw away what he cost as it's getting a bit boring now, he's done enough to justify that he's the horse he is on his merits," said Henderson.
"Yes, there was pressure when he ran in his first bumper and first hurdle race as everyone was probably waiting to laugh, but I think he's probably proved himself now.
"We're just very lucky with these two-milers and I'm not putting Jonbon in there yet because he's got a long way to go, but to have had Sprinter, Altior and Shishkin in consecutive years, you are very lucky. Let's hope this fellow joins them."
Taking on Jonbon are Harry Fry's Boothill, Dan Skelton's Unexpected Party and the Jane Williams-trained Honneur D'Ajonc.
Boothill won in open company at Ascot last month on what was only his third start over fences and Fry is hoping the gelding's extra experience can come into play against Jonbon.
He told his Grosvenor Sport blog: "We'll either be good enough or we won't. It'll be fascinating to see, obviously we're coming up through the ranks from a novice handicap into a valuable handicap the last day, and now into a level-weights novice.
"We're taking on the ante-post favourite for the Arkle Chase. It's not going to be an easy task, but we do have more experience than him."
