There is a Blender branch with Alembic import and export. I have heard that Alembic is becomming a new format standard in animation, and probably will also become a standard in gamedev, since you can export and import, besides meshes and skeletal animations, particles and other physics stuff. If a studio uses Alembic files in their pipeline, they won’t really care which program you used to make it, since the original file is also Alembic. I have seen that Alembic support is on UE4 roadmap, but probably it will be merged in Blender’s trunk before it will be officially added to UE4.