If it's Roy Thomas continuity Falsworth-Union Jack and Aubrey-Destroyer, they'll have better teamwork...they like to watch each others backs...if you get my meaning. A veritable Band of Thebes here.
In Golden Age continuity, Marlowe, the Destroyer was about as powerful as Cap and may have had a little bit of superstrength. Roy Thomas reinvisioned The Destroyer as Brian Falsworth operating behind enemy lines under an assumed name as an American journalist (curse retcons!)
He later gave up that identity to become the second Union Jack after his father, Lord Montgomery Falsworth was rendered infirm after a battle with his brother Baron Blood.
Brian had a supersoldier derivative, not quite as good as Cap's, but close. It enhanced his strength, speed, reaction time, endurance, etc. and he later gained the ability to generate, direct and shoot electricity from his fingertips, he became quite versatile with this, detecting and gathering static electricity currents in the air, allowing him to jump from an airplane and glide down on the electric currents and safely reach the ground.
Roger Aubrey-Destroyer also possesses a super soldier serum derivative similar to Falsworth's and the ability to shrink in size to a few inches in size and back to normal height. In his diminuitive size he possesses the same strength as he does at regular size. Union Jack could easily surprise Batman by tossing a shrunken Aubrey at him, have Aubrey grow to regular size and waylay Bats as an opening salvo.