OpenRC should give you an idea of how long it takes to integrate an init system. It's still only in the experimental release, even though efforts to port it to Debian have started even before Wheezy was released.
So, if you think any of those two tools would work: just show us the code. A working Debian package. Please make sure it is ready in time. Jessie is frozen in Nov-5 and there's much integration work to be done before that.
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