My guess is that he will turn up at the training ground and be refused entry. He probably has nothing in writing, so the Toulon lawyers will be working overtime with his agent to sort out the mess that Mourad Boudjellal has caused with his outburst. The Toulon HR department will probably have been working on this night and day. Whatever, this is going to get messy unless they say here is the money for the rest of the contract and here is your release. Sign here please. No wonder Fekitoa wanted out.
The other players, especially any other 'imports' are going to be wondering who is next? If I had signed already for them, I too would be re-considering my options.
So far, Julian has shown some class with that tweet. If I were him, I would temporarily keep off social media (both him and his wife) until he sees the money and release, and even then I would keep mum about it all. Chances are, they will stick him (and maybe his wife) with an NDA.