As you can see on the milestones page on github, there is no 0.6.2 planned. All the new issues are marked for 0.7.0.
The version tree is a funny pyramid:
0.6.1 was already a special case since it was not a maintenance release like all the previous 0.x.1, but really a new version coming with new features and improvements.
The fact that the next version is marked as a major one means that it will not be backwards compatible and will probably includes netcode change, new maps or tilesets. It also means that the 0.6 modifications will not be compatible with the new version and will need to be ported again.