We tend to blame the failure of Helitech on not being at Duxford. I think we should see that the success of Helitech at Duxford as the success of the location rather than the event. Duxford is pretty unique and there are signs that even putting a helicopter show at a similar venue will not work either. ExCel is no worse that the RAI Amsterdam and yet that worked to a point. European Rotors the new European version of Helitech [dismembered] is scheduled for Cologne in November. That venue is as yet unseen but I see it as an ExCel/RAI in Cologne. No chance to fly in your personal helicopter even if there are airliners by then.
Industry is [apparently] supporting European Rotors despite it having all the wrong things with it that are cited for the ExCel/Farnborough event. No aerial access being the main gripe.
There is another helicopter show in the UK that has been attempting to take on the mantle of a new Helitech and that struggles. Heli-Expo may not have been to Duxford but it has tried various 'live airfield' venues over recent years [Wycombe and Sywell] that can be flown into by business or private flyers but it has not thrived. Nothing similar seems to work to well no matter where it is based. Unless the magic is wholly Duxford or Redhill before it.
The Helitech revival event last year at Farnborough did not work and neither did the event proposed for Silverstone a few years back. Despite it being cited as the prime reason that post Duxford failed, the Farnborough event offered a free fly-in option but few came [and I know the November weather was vile].
There is perhaps another important aspect that is rarely appreciated.
The key is the people that run the event and how they run the event. If either of those aspects is flawed neither industry or the people with come. As those usually nice people at HAI illustrated comprehensively a few years ago with a venue in Kentucky. It was financially a dead cert for the organisers but the attendees got a whiff of not being appreciated and did not enjoy a share in the organisers good fortune. They soon turned their backs. As a result no-one turned out in great numbers in 2016 and this year HAI was not in Louisville, Kentucky!
All things have a positive though. Those that did attend Louisville 2016 were able to have something like a dozen free Tote Bags each to take home.......
So Helitech World Expo could prevail but it mainly depends on the organisers understanding and appreciating the customer and putting on what the customer wants not what they, the organisers, think they want.