As long as he doesn’t submit that protocol as ActivityPub 2.0 or whatever, it’s not compatible with the wider fediverse, so not interesting.
If they get their act together and publish a real protocol / standard that a developer can read, implement, and then have a server capable of federating, then activitypub 1.0 can diaf and we can all praise our new activitypub 2.0 overlords.