When I first saw the "Future is Plural" slogan during the time when we were anti-endogenic* I believed what I was told it was "supposed" to mean.
"They want to abuse children so they develop DID and OSDD."
Which yes, does sound horrible and at that time in my life I believed it without much thought, which was a stupid move. People change, and as we learned my about ourselves, met so much better people and company and so on, we no longer have anti-endogenic beliefs due to how that belief was affecting us negatively (*tldr: it was not healthy for us mentally and stunted our system), so since then we thought about the quote a lot now.
To us it now means, and in retrospect always meant:
"The acceptance of ones and others plurality, where people can be openly plural if they so wish to without bullying or hatred for being themselves."
And to me it also just means those who are on the CDD side get support and care they need. Where DID is no longer demonized, no longer has harmful stereotypes and stigma attached to it where more research and study get funded, more understanding.
Additionally, yes, plurality outside of a CDD is more recognized as something not inherently disordered and really it's own thing and often something that's 100% a self-identifiable label.
TLDR: it just means support, acceptance and awareness.
-- Blurry (he/jet/it)