User blog comment:Datamari/Datamari's One Minute Melee: Season 1/@comment-30635962-20180715125258

A few guesses:

Dr. Cortex vs. Ripto

Aqua vs. Sol Badguy

Mr. Incredible vs. All-Might

Leonardo vs. Blake

Dark Pit vs. Shadow

Machamp vs. Android 16

James Bond vs. John Wick

Sonya Blade vs. Black Widow

Jax vs. Cyborg

Iron Man vs. Samus

Sonic vs. Lilac