If this team reformed under a new brand they would have the proven track record and clout in the industry to score a lot of funding money - assuming they didn’t just want to self-fund on loan (and a bank would likely be pretty receptive to that).
All the value (outside of the IP held by the company) is in the people that resigned. This is an excellent move and I hope more employees feel empowered to make moves like this to ensure an equitable share in decision making and revenue distribution.