Quite possibly. If he didn't accept that his form is shocking and deserves to be dropped then frankly he can move clubs. I don't think even Rooney's biggest apologists (of which I'm probably one) would side with Rooney of van Gaal.He'd more likely be red-faced and pointing angrily at van Gaal after scoring. You know how footballers are.
That said I can't see him being dropped against Arsenal. It will be against a weaker side at first so it can be disguised as mere rotation.