Lucian Skin Idea

So, I had an idea for a skin for Lucian that would scratch a long-called-for champion idea too. Sorry if this has been voiced before, but:

Senna as a skin for Lucian.

Obviously, a lot of work for a complete do-over akin to Pulsefire Ezreal and Spirit Guard Udyr, but why not just have it be an alternate universe thing where Lucian got taken by Thresh, and Senna took up his gun?