Not in any easy idempotent way unfortunately, you have some options, you could;
* Use win_command/win_shell to create the task but the COM API used can get quite complex and dealing with idempotency would be difficult
* You can copy the newer version of the module
https://github.com/ansible/ansible/blob/devel/lib/ansible/modules/windows/win_scheduled_task.ps1 to a directory called library and use it like you would when 2.5 is out. It is best to name the module with a special suffix so you know that it is a custom version and not the builtin module used in Ansible.
Thanks
Jordan