I've said the latest vision of MA-MAN connection in my previous post in this topic and in some other topic. I may repeat and explain it once more.
1) MA is single-player oriented product with some multiplayer options
2) MAN is multiplayer oriented product with some single-player training
3) These products are different
4) Multiplayer has some compatibility, i.e. MA players may play with MAN players and vice versa
5) MA players will continue getting what they have paid for, i.e. MA multiplayer will continue be free
6) Forget about 90 days notice. It means that the company should not grant this service forever or forever for free - we are all mortal. And this statement is about MA death. And I believe it will occur not so soon that you should remember it.
7) MAN will have some multi-player features that MA will not have.
MA players are free to choose continue playing MA or upgrade to MAN for a special price, which will be available soon.