Serious_Noize! They have just made the announcement and are sorting through what are likely to be some complicated legal issues and the fine details which invariably go with a purchase like this. And yet here you are, stomping around like a 5 year old girl demanding answers to questions which at this time do not have answers. So let's just get one thing out of the way, to be brutally honest:
They don't owe you ANYTHING. Nothing. They didn't buy Cakewalk the company, they didn't buy any of its debt or financial obligations to its customers. They weren't responsible for Cakewalk going bust, and it's not their responsibility to honor any "deals" that Cakewalk made before they went bust. So lighten up and be grateful for the fact that whereas yesterday there was nothing to indicate that Sonar would EVER be developed again, today you found out that it will continue into the future. If they decide to take on the responsibility of activating a version of Sonar that you DID NOT PAY THEM ONE CENT FOR, then they're giving you 100% more than they owe you. Your beef is with Gibson and Cakewalk, not BandLab.