I don’t have any particular interest in seeing M: Origins or Moneypenny Begins. The supporting characters in Bond are just that for a reason; it helps that at present they’re played by actors of the calibre of Fiennes, Kinnear, Harris, etc, but as characters, I’ve no particular interest in learning about them. Nor do I really see what point there’d be in a movie about 006 or 008.
Rather than the MCU approach, however, I would be interested in Bond following the DC route, namely a multiverse take. At present, there’s the DCEU, we’ve The Batman coming, while we’re also supposed to be seeing Michael Keaton return, then there’s one-shots like Joker (that’s in addition to the tv shows).
I would therefore love to see Eon release an official big-budget 007 movie every few years but also maybe do something smaller scale for Netflix or tv. Let Brosnan or Dalton return as their versions. Have Lazenby bookend as an older 007 reminiscing his revenge on Blofeld after OHMSS (with a younger actor in the period scenes). Do a 1950s origin story or Bond still as submarine commander, etc. Make them smaller-scale, character based, more detective-style, whatever.
In the last few years, there have been numerous Sherlock Holmes onscreen - Cumberbatch, RDJ, Jonny Lee Miller, Ian McKellen, even Will Ferrell. Basically, I think there’s room for similar approaches with Bond.