Suggested by GuardianAngel1911 with Mjolnir and the Kringleswor
A time storm hits two distant alternate versions of Earth and when it does one warrior from each world, each already lost through time are ripped from their world.
One is a time lost Samurai, a warrior with a mystical sword of great power, a symbol for hope and for a better future, his name Jack, Samurai Jack.
The warriors find themselves on an empty beach to the East stretches nothing but water far as can be seen, to the West, North, and South is clean white sand, a light breeze flows through the air as the warriors appear a mere fifty feet apart. A mysterious voice in the back of both their minds tells them that should they ever hope to return to their worlds they will destroy their foe without hesitation.
Cap readies his shield as Jack draws his sword, the ultimate clash of shield and sword is about to begin.
Weapon wise, Cap only has his shield, Jack only has his sword.