As for the Blaze of it all, I've been curious about how they will handle this. Will they actually release video from Blaze's time in the band? I have a hard time believing it. Will they end the documentary on Bruce leaving and Blaze joining? Again, doesn't seem right. But then you have a documentary that will cover 1990 to 1999 to go with a video from 1992, i.e. most of the decade goes unrepresented. The only way to do it right is to include some live videos from the Blaze era and a live video from Ed Hunter. It's a lot of previously unreleased footage which doesn't really fit the band's approach to these things so far (mostly repackaging previously released material).
On this, I wouldn't bet against Maiden. They have usually been ahead of the curve when it comes to new formats (long form video, DVD, websites, VOD, etc). It hasn't become clear what the next standard is and maybe that's why Maiden is holding off. Right now it seems like streaming is the way to go, but there isn't a clear answer to how to release a product like an Iron Maiden video without giving a streaming service control over the license. They want to host it on their own platform, but it's not clear how to do that without building a streaming service infrastructure from the ground up. Somebody will figure it out and then Maiden will get on board with that imo.