As for the 'OMGLUKESKYWALKER' part -- unfortunately, there is no way I can't have Gintoki react that way. HOWEVER, because it's Gintama, I guarantee it'll be absolutely hilarious and the way we'll do it will probably be pretty entertaining because it'll involve things like beam sabers (which was, as I mentioned, an arc in Gintama), as well as other ridiculous shenanigans that will probably make Luke wtf a bit.

Edit: Beam Saber