I think the game will be more fleshed out than the bare bones structure it has now like in career, animations. stadiums, scenarios etc also i believe there will be visual improvements but cant see the core structure they have got now changing.
Hopefully not. For me, the way Cricket games succeed is on a revolution/evolution model - the next one should be a heavily refined and improved DBC14. Then you look to see if you need to make major changes on the 3rd version: sometimes adding a bunch of new features is enough: if it isn't, then you need to start again.