If what Assange and team are going through is any indication, the US Government has set a dangerous precedent in how it deals with people who go against the establishment, exposing it. They spin a narrative saying he broke certain laws, which is true, but doesn't explain how hard they are hitting Assange with behind the scenes activities to extradite him to the USA. The real motivation is to get back at Assange for publicly shaming the US Government on the world stage with various leaks.

> What will replace wikileaks?

Nothing, at least anytime soon. If wikileaks sticks to it's mission of opening Governments without the negative associations, as you said, that would suffice.