There is the possiblity of a new frame material coming onto the market, hopefully sooner rather than later, but it's called simply super magnesium, which is made better than magnesium that use to be used in a few custom frames.
https://insights.globalspec.com/arti...or-bike-frames
https://www.handbuiltbicyclenews.com...next-big-thing
There is also a new higher strength aluminum allow that could also break into the market.
How will this Super Mag, and higher strength AL compare with other frame materials we already have remains to be seen.