** All of this is just my opinion, I speak for no one but me. **
My best guess would be that everyone involved wants Traveller to grow and prosper. The best way to achieve that is to welcome all the Traveller material anyone wants to produce. In the end, it sounds like people wanting a new Traveller license or to renew an expired license will need to go through Mongoose instead of Marc.
Anyone wanting a license to continue The New Era may have problems getting a license since the goal appears to be to use Mongoose and T5 to create a new and improved version of Classic Traveller to replace CT, MT, TNE and T4. Bits will probably be warmly welcomed.
[As an aside, it seems inconceivable that Mongoose would not want to continue Traveller representations in such popular systems as T20/D20 or Hero (GURPS is already guaranteed a continued presence) if for no other reason than to expand the market for Mongoose published "Adventures", "Atlases" and other Traveller goodies.]
** All of this is just my opinion, I speak for no one but me. **