Such injustice?

No doubt in my mind Britain will hand him over to the US who have charged him with Computer Hacking.
Immediately upon his arrest he was taken to Westminster Magistrates Court
Judge Michael Snow found Assange guilty of violating a bail agreement in an earlier case, and he faces up to a year in jail there in addition to the U.S. charges.

Why is Mr Assange such a threat?
Because Governments all over the world are terrified all their dirty, deadly secrets will be exposed, thus undermining the institution called "Democracy"
As all Governments know. an informed public is a dangerous public.

Was gonna happen sooner or later

Everybody has few friends right now.
So i expect the U.S. has done a 'deal' with the U.K. and probably the Ecuadoran's too.

Ecuador get a pain in their ass out the door; it's no longer Britain's problem and Trump looks like a hero at home.

And amid all this political nonsense, what's the betting little is mentioned of all those betrayed ?
By any of those parties ?

what will happen to him now? do we still need him to continue wikileaks?

Yep, he's darling one minute to one side and their enemy the next. Vice-versa as well.

Hypocrites

An outrage. Whistleblowers are generally REWARDED. This is repression.