There are three scenarios which may explain what the club is facing, I can't decide which is the nearest one to the truth.
The board of directors took an earlier decision, weeks or months ago, that they'd end Deschamps' contract with the club or they'd ignore him so that he'd resign. But they couldn't take such a step without having an agreement with Lippi/top manager to coach the team starting from the next campaign. And, this is the first scenario.
The second one is that the management didn't really know about Deschamps' resigning but they was expecting it. Therefore, they started their talks with Lippi and he agreed. But he can't announce it to the media, as the negotiation is still running and the announcement should be official.
The worst and the last scenario is that the management wasn't expecting Deschamps' resigning and they aren't in talks with any other coaches. And things would be much terrible if Lippi doesn't want to cut his sabbatical, besides Prandelli has a contract already with Fiorentina. Also, all the other rumored coaches are either average coaches or unrealistic to be join us. And if this scenario is right, so we're completely screwed.