No way on earth that regular 1080p Blu-ray discs will not be part of the package well into the foreseeable future (i.e. 10 years).
To state the obvious, the TBC artwork would go nicely with the artwork for the first steelbook and would be the logical choice.
If this film does well it's reported that a Director's Cut could be released at some point with the missing 1 hr 20 mins not included here . . . not forgetting that the first cut was 3 hrs 40 mins with studio execs wanting to do a grand two part finale BREAKING DAWN, DEATHLY HALLOWS, MOCKINGJAY style . . .
Even though the director poo-pooed that idea he did say recently ...
". . . but I think it could be pretty cool to do a Kingsman: The Golden Circle – Version 2, it might be fun. If people see this I’ve got a real—and also that will spark some real debate about what I cut out and why, and I’m sure some people will say I was an idiot for doing it".
". . . but maybe I can do another cut. Some of the stuff we cut out was so good, as well, that I was very sad to see it cut. Normally when I edit, stuff that’s not good enough just gets cut out and it’s pretty quick to get down to a manageable length. You just go ‘Yeah that doesn’t really work.’ This time it was like, ‘That really works."