Now the only way I can see Wade having a chance is if he pretended to be the Void, knowing him dressing up in a black sheet and saying wooooo, all the while plugging a baffled Sentry with pianos, adamantium bullets, Anti-metal water balloons, small furry animals, sarin gas, vibranium shuriken and a particle beam
Sure the Void thing will unnerve Sentry for a while; who will eventually work out its not his bad side gone mental and punt Wade's head into orbit. I see it in the style of Deadpool Vs Wolverine in Origins. An unrelenting barrage of jokes & weapons until the penny drops.
What do you say?