Even though we haven't heard any 'official announcement' yet, might be just sometime now as they might have been ironing out few things before going out in public.
And as mentioned, maybe the date and venue is one obstacles that they have to settled. The network will have to come out as the best place for this fight is, and then the date itself.. I think money wise and split, verbally they could have talk it down already. And we are going to be privilege to witnessed another great fight if this happens this year.
That's likely the case on why there's still no update about them, I know that both camps have agreed to have the fight at Las Vegas, Nevada where it's neutral for the both camps but this is still not sure as long as there's no official announcement and its details. Also, the date is very crucial to pick and both sides would have to agree with the specific month and exact day. As for money talks, I believe Crawford will take the 40% cut just to make the fight happen.
Anyway, aside from that, I found an article while browsing at the internet. Seems like the Legendary
Mike Tyson is siding with Terence Crawford because of his experience and his IQ in the ring and also, he was basing his pick on how Crawford defeated Shawn Porter by a TKO while Spence finds himself with a 12 full round fight and won by SD.