I received some information that Leica is preparing to release a new, updated Summicron-M 28mm f/2 ASPH lens. The new version will be wider, with a newly designed metal lens hood and will take E49 filters. A new Summicron-M 28mm f/2 ASPH lens was introduced back in 2012 as part of a Leica M9-P “Meister Camera” limited edition set:
For comparison, this is how the current Leica Summicron-M 28mm f/2 ASPH lens looks: