Yes, even though Josh Karp’s tell-all book treads very carefully whenever Oja’s involved, he makes it clear that she certainly delayed efforts to move forward by reneging on various deals (e.g. Showtime). I guess it’s such a tricky project because although fans and cinephiles want to see another Welles film no matter the condition, the filmmaker’s family and colleagues will likely want to avoid anything that could damage his legacy, like a repeat of Jess Franco disastrous effort to revive Don Quixote, at all costs.
There was an article in a 2016 edition of Cinema Journal that deep dived into the production history of Don Quuxite. The researcher revealed there was additional, usable footage located in various archives around the world which the world would likely never see, as Welles’ family is reluctant to hand the reigns over to an outside party. As part of the promotion, I believe Netflix is producing a documentary on The Other Side of the Wind to release simultaneously with the film, which should help contextualize the work since it’s going to be 40 years divorced from its cultural context.
There were times where it seemed like the universe was actively working to sabotage any efforts for this film to reach completion. It even makes troubled projects from other mediums, works like DNF and Chinese Democracy, look like small potatoes by comparison! Even if the final film doesn’t come together, I’m completely content with anything that offers a glimpse into what Welles producing on the fringes of New Hollywood looked like.